An effects processor and a speaker

Abstract

This disclosure provides an effects processor and a speaker. In the effects processor, an audio signal receiving module acquires signals via an audio input interface and a first operational amplifier circuit, and controls the on / off state of first and second relays using a toggle switch to switch between different operating modes. A frequency band adjustment module precisely adjusts the gain of each audio frequency band using a multi-frequency potentiometer and a second operational amplifier circuit. A cabinet simulation module, composed of a third operational amplifier circuit, a filter circuit, and a fourth operational amplifier circuit connected in series, simulates the frequency response characteristics of the target speaker to process the audio. The output module amplifies the processed signal using a power amplifier and transmits it to the sound-producing device for playback. Thus, by flexibly selecting the connection of the frequency band adjustment module and the cabinet simulation module via relays, and combining this with analog circuit technology, a full-band effects processor can be adapted to most devices on the market, reducing the number of devices and cost, and avoiding equipment damage due to incorrect connections.

Description

Technical Field

[0001] This disclosure relates to the field of audio processing, and more particularly to an effects processor and a speaker. Background Technology

[0002] In the field of music equipment, there are many problems with the compatibility of different types of effects pedals with amplifiers. Currently, distortion pedals can usually only be connected to dedicated amplifiers, preamplifiers can generally only be connected to the return jack of dedicated amplifiers, and multi-effects pedals are only suitable for full-range devices. The applicability of each type of effect is narrow and not universal. For example, if a distortion pedal is incorrectly connected to a non-dedicated amplifier, not only will the expected tone not be obtained, but the equipment may also be damaged due to impedance mismatch and other problems.

[0003] Existing solutions to address these compatibility issues are often prohibitively expensive. On one hand, musicians need to purchase various types of amplifiers to accommodate different effects pedals, which significantly increases equipment costs. On the other hand, the poor versatility of the equipment results in a cumbersome setup that is extremely inconvenient to use and carry. Utility Model Content

[0004] This disclosure provides an effects unit and an amplifier to at least solve the above-mentioned technical problems existing in the prior art.

[0005] According to a first aspect of this disclosure, an effector is provided, the effector comprising:

[0006] An audio signal receiving module is connected to a frequency band adjustment module, a cabinet simulation module, and an output module via a first relay and a second relay. It includes an audio input interface and a first operational amplifier circuit. It is used to receive audio signals and switching signals from a toggle switch through the audio input interface, and to control the on / off state of the first relay and the second relay according to the switching signals, so as to control the working mode of the effect unit through the on / off state of the first relay and the second relay.

[0007] The frequency band adjustment module is connected to the audio signal receiving module and the enclosure simulation module, and includes a multi-frequency potentiometer and a second operational amplifier circuit, used to adjust the gain of different frequency bands of the audio signal through the multi-frequency potentiometer and the second operational amplifier circuit;

[0008] The enclosure simulation module is connected to the audio signal receiving module, the frequency band adjustment module and the output module. It includes a third operational amplifier circuit, a filter circuit and a fourth operational amplifier circuit connected in series. It is used to simulate the audio signal according to the frequency response characteristics of the target speaker and transmit the processed audio signal to the output module.

[0009] The output module is connected to the audio signal receiving module, the enclosure simulation module, and the sound-generating device. It includes a power amplifier for amplifying the processed audio signal based on the power amplifier and transmitting it to the sound-generating device so that the sound-generating device can play the audio signal.

[0010] In one possible implementation, the input terminal of the first relay is connected to the output terminal of the audio signal receiving module, the normally open contact is connected to the input terminal of the frequency band adjustment module, and the normally closed contact is connected to the input terminal of the enclosure simulation module.

[0011] The input terminal of the second relay is connected to the output terminal of the frequency band adjustment module and the output terminal of the audio signal receiving module, the normally open contact is connected to the input terminal of the enclosure simulation module, and the normally closed contact is connected to the input terminal of the output module.

[0012] In one embodiment, the first operational amplifier circuit includes a first operational amplifier, and the audio input interface is connected to the non-inverting input terminal of the first operational amplifier through a signal filtering circuit and a protection circuit.

[0013] The signal filtering circuit includes two capacitors. One end of each capacitor is connected to a different pin of the audio input interface. The other end of each capacitor is connected in series with a resistor to form a voltage divider point and is connected to the voltage divider resistor. The other end of the voltage divider resistor is connected to the bias power supply.

[0014] The protection circuit includes a bidirectional protection diode, one end of which is connected to the power module and the other end is grounded;

[0015] The inverting input terminal of the first operational amplifier is connected to its output terminal, the first power supply terminal is connected to the power supply module and has a capacitor connected in parallel, and the second power supply terminal is grounded.

[0016] In one embodiment, the multi-frequency potentiometer includes a high-frequency potentiometer, an intermediate-frequency potentiometer, and a low-frequency potentiometer, and the second operational amplifier circuit includes a second operational amplifier;

[0017] One end of the high-frequency potentiometer is connected to the audio signal receiving module via a capacitor, and the other end is connected to the second operational amplifier via a frequency band adjustment auxiliary circuit.

[0018] One end of the intermediate frequency potentiometer is connected to the audio signal receiving module, and the other end is connected to the second operational amplifier through the frequency band adjustment auxiliary circuit.

[0019] One end of the low-frequency potentiometer is connected to the audio signal receiving module via a capacitor, and the other end is connected to the second operational amplifier via the frequency band adjustment auxiliary circuit;

[0020] The non-inverting input of the second operational amplifier is connected to the frequency band adjustment auxiliary circuit through a resistor, and the inverting input is connected to its output through a parallel resistor and capacitor, and grounded through another resistor and capacitor.

[0021] In one embodiment, the frequency band adjustment auxiliary circuit includes a first auxiliary branch, a second auxiliary branch, and a first voltage divider branch;

[0022] The first auxiliary branch includes a capacitor and a resistor connected in series. The input terminal of the first auxiliary branch is connected to the high-frequency potentiometer, and the output terminal is connected to the non-inverting input terminal of the second operational amplifier.

[0023] The first voltage divider branch includes a capacitor and a resistor connected in parallel. The input terminal of the first voltage divider branch is connected to the low-frequency potentiometer, and the output terminal is connected to the non-inverting input terminal of the second operational amplifier.

[0024] The second auxiliary branch includes two resistors connected in series. The input terminal of the second auxiliary branch is connected to the intermediate frequency potentiometer, and the output terminal is connected to the output terminal of the voltage divider branch.

[0025] In one embodiment, the third operational amplifier circuit includes a third operational amplifier, wherein the non-inverting input terminal of the third operational amplifier is connected to a bias voltage through a resistor, the inverting input terminal is connected to the frequency band adjustment module through a resistor, and the inverting input terminal is also connected to its output terminal through another resistor.

[0026] The input terminal of the filtering circuit is connected to the output terminal of the third operational amplifier, and includes a low-frequency filtering branch, an intermediate-frequency filtering branch, and a high-frequency filtering branch. The low-frequency filtering branch includes a capacitor and a resistor connected in series. The input terminal of the low-frequency filtering branch is connected to the output terminal of the third operational amplifier, and the output terminal is connected to the input terminal of the intermediate-frequency filtering branch. The intermediate-frequency filtering branch includes a resistor and a capacitor connected in series. The input terminal of the intermediate-frequency filtering branch is connected to the low-frequency filtering branch, and the output terminal is connected to the input terminal of the high-frequency filtering branch. The high-frequency filtering branch includes a first high-frequency filtering branch and a second high-frequency filtering branch connected in parallel. The input terminal of the high-frequency filtering branch is connected to the output terminal of the intermediate-frequency filtering branch, and the output terminal is connected to the inverting input terminal and the output terminal of the fourth operational amplifier of the fourth operational amplifier circuit.

[0027] The fourth operational amplifier circuit includes the fourth operational amplifier, the non-inverting input terminal of the fourth operational amplifier is connected to the bias voltage through a resistor, and the output terminal is connected to the output module.

[0028] In one embodiment, the enclosure simulation module further includes a second voltage divider branch, which includes a voltage divider network consisting of two resistors connected in series. The input end of the voltage divider network is connected to the power supply module, and the output end is grounded. A capacitor is connected in parallel with the resistor near the ground end in the voltage divider network.

[0029] In one embodiment, the positive input terminal of the power amplifier is connected to the audio signal receiving module and the enclosure analog module through a series adjustable resistor and capacitor, the inverting input terminal is grounded, the positive output terminal and the inverting output terminal are connected to the sound-generating device through a device interface, the first power supply terminal is connected to the power supply module, and the second power supply terminal is grounded.

[0030] In one embodiment, the effects unit further includes a power module, which includes a charging module, an external power input connector, and the toggle switch. The charging module is connected to the power bus via a pin connected in parallel with the external power input connector. One end of the toggle switch is connected to the power bus. The power bus is connected to the audio signal receiving module, the frequency band adjustment module, the cabinet simulation module, and the output module, and is used to provide power input to the audio signal receiving module, the frequency band adjustment module, the cabinet simulation module, and the output module.

[0031] The toggle switch includes a first position, a second position, a third position, and a fourth position. The first position is the power off position, used to disconnect the power supply. The second position is connected to the second relay and used to control the second relay to be energized. The third position is the relay off position, used to control the first relay and the second relay to be de-energized. The fourth position is connected to the first relay and used to control the first relay to be energized.

[0032] According to a second aspect of this disclosure, a speaker is provided, including the aforementioned effects unit.

[0033] This disclosed effects processor and speaker enclosure features an audio signal receiving module that acquires signals via an audio input interface and a first operational amplifier circuit. A toggle switch controls the on / off state of first and second relays, switching between different operating modes. A frequency band adjustment module, utilizing a multi-frequency potentiometer and a second operational amplifier circuit, precisely adjusts the gain of each audio frequency band. A cabinet simulation module, composed of a third operational amplifier circuit, a filter circuit, and a fourth operational amplifier circuit connected in series, simulates the frequency response characteristics of the target speaker. The output module amplifies the processed signal using a power amplifier and transmits it to the sound-producing device for playback. By flexibly selecting the connection of the frequency band adjustment module and the cabinet simulation module via relays, and combining this with analog circuit technology, a full-band effects processor can be adapted to most devices on the market. This reduces the number of devices and cost, and avoids equipment damage due to incorrect connections. Compared to existing solutions, this solution effectively reduces the number of devices required, eliminating the need for musicians to purchase multiple amps to accommodate different effects pedals; it also reduces equipment expenses and lowers the investment cost of music equipment; at the same time, through clear relay selection, it avoids situations such as poor tone or equipment damage caused by plugging in the wrong device, providing musicians with a more convenient, efficient and reliable user experience.

[0034] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0035] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments, taken in conjunction with the accompanying drawings. Several embodiments of this disclosure are illustrated in the drawings by way of example and not limitation, in which:

[0036] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0037] Figure 1 A schematic diagram of the composition structure of the effects unit according to an embodiment of this disclosure is shown;

[0038] Figure 2 A schematic diagram of the composition structure of the audio signal receiving module of the effects unit according to an embodiment of the present disclosure is shown;

[0039] Figure 3 A schematic diagram of the composition structure of the frequency band adjustment module of the effects unit according to an embodiment of the present disclosure is shown;

[0040] Figure 4 A schematic diagram of the cabinet simulation module of the effect unit according to an embodiment of the present disclosure is shown;

[0041] Figure 5 A schematic diagram of the composition structure of the output module of the effect unit according to an embodiment of the present disclosure is shown;

[0042] Figure 6 A schematic diagram of the power module composition of an effect unit according to an embodiment of the present disclosure is shown. Detailed Implementation

[0043] To make the objectives, features, and advantages of this disclosure more apparent and understandable, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0044] Figure 1 A schematic diagram of the composition structure of the effects unit according to an embodiment of the present disclosure is shown.

[0045] refer to Figure 1 This disclosure provides an effects unit that includes an audio signal receiving module, a frequency band adjustment module, a cabinet simulation module, and an output module. The frequency band adjustment module can be considered as a Tonestack EQ module (Tonestack Equalizer Module), and the cabinet simulation module can be considered as a Cab (Cabinet Simulator Module) cabinet simulation module.

[0046] The audio signal receiving module includes an audio input interface and a first operational amplifier circuit. This module receives audio signals transmitted from external devices and controls the on / off state of the first and second relays via a toggle switch, thereby controlling the audio signal transmission path—also known as the operating mode of the effects unit. The audio signal and switching signal are input through the audio input interface, which includes multiple signal receiving pins.

[0047] After the audio signal enters, it first passes through the first operational amplifier circuit. Based on the preliminary processing and amplification of the audio signal by the first operational amplifier circuit, it enters the following module.

[0048] The operating modes of the effects unit can be divided into three modes according to actual needs: the first mode, the second mode, and the third mode. In the first mode, the audio signal is output directly from the audio signal receiving module and then enters the output module. In the second mode, the audio signal is output from the audio signal receiving module, enters the cabinet simulation module, and then enters the output module. In the third mode, the audio signal is output from the audio signal receiving module, enters the frequency band adjustment module and the cabinet simulation module, and then enters the output module.

[0049] The frequency band adjustment module is connected to the audio receiving module and the enclosure simulation module. It includes a multi-frequency potentiometer and a second operational amplifier circuit. The multi-frequency potentiometer is used to adjust the gain of different frequency bands of the audio signal. In the current operating mode (third operating mode), the frequency band adjustment module operates. It receives the audio signal processed by the audio signal receiving module, then adjusts the audio signal through the multi-frequency potentiometer. The adjusted audio signal flows into the second operational amplifier circuit for amplification, and then flows into the enclosure simulation module. The multi-frequency potentiometer is controlled externally, such as through a knob, button, pedal, or touchscreen. Adjusting the gain of different frequency bands of the audio signal using the multi-frequency potentiometer can be considered as receiving adjustments made by the user through external adjustment components such as knobs, buttons, pedals, or touchscreens.

[0050] The cabinet simulation module, connected to the audio signal receiving module, frequency band adjustment module, and output module, includes a third operational amplifier circuit, a filter circuit, and a fourth operational amplifier circuit connected in series. It is used to simulate the audio signal based on the frequency response characteristics of the target speaker and transmit the processed audio signal to the output module.

[0051] The cabinet simulation module is connected to the audio signal receiving module and the frequency band adjustment module. The cabinet simulation module includes a third operational amplifier circuit, a filter circuit, and a fourth operational amplifier circuit. When the current effects unit is in either the second or fourth / third operational mode, the cabinet simulation module operates. The audio signal output from the audio signal receiving module and the frequency band adjustment module enters the cabinet simulation module. Then, based on the frequency response characteristics of the target speaker (i.e., the device to be simulated), the third operational amplifier circuit, the filter circuit, and the fourth operational amplifier circuit simulate the incoming audio signal, outputting an audio signal with a specific speaker effect to the output module.

[0052] The output module connects to the audio signal receiving module, the enclosure simulation module, and the sound-generating device, and contains a power amplifier. After the audio signal enters, the output module amplifies the signal through the power amplifier, and then transmits the amplified audio signal to the sound-generating device for playback. The sound-generating device is a device that converts electrical signals into sound signals and plays them back, such as a loudspeaker.

[0053] In one embodiment of this disclosure, the input terminal of the first relay is connected to the output terminal of the audio signal receiving module, the normally open contact is connected to the input terminal of the frequency band adjustment module, and the normally closed contact is connected to the input terminal of the enclosure simulation module; the input terminal of the second relay is connected to the output terminal of both the frequency band adjustment module and the audio signal receiving module, the normally open contact is connected to the input terminal of the enclosure simulation module, and the normally closed contact is connected to the input terminal of the output module.

[0054] The effects unit also includes a power module, which is connected to the audio signal receiving module, frequency band adjustment module, cabinet simulation module, and output module to provide power input. In addition to providing power, the power module also provides a toggle switch with multiple positions. By toggling these positions, the on / off state of the first and second relays can be controlled, thereby controlling the effects unit to enter different operating modes.

[0055] Thus, this embodiment of the disclosure, through the flexible selection of the frequency band adjustment module and the cabinet simulation module via relays, combined with analog circuit technology, achieves compatibility with most devices on the market based on full-band effects pedals. This reduces the number of devices and costs, and avoids equipment damage caused by incorrect connections. Compared to existing solutions, it effectively simplifies the number of devices, eliminating the need for musicians to purchase multiple amps to accommodate different effects pedals; it reduces equipment expenses and lowers the investment cost of music equipment; at the same time, through clear relay selection, it avoids situations such as poor tone or equipment damage caused by incorrect device connections, providing musicians with a more convenient, efficient, and reliable user experience.

[0056] Figure 2 A schematic diagram of the composition of the audio signal receiving module of the effects unit according to an embodiment of the present disclosure is shown.

[0057] refer to Figure 2 In one embodiment of this disclosure, the first operational amplifier circuit includes a first operational amplifier. The audio input interface is connected to the non-inverting input terminal of the first operational amplifier through a signal filtering circuit and a protection circuit. The signal filtering circuit includes two capacitors, one end of which is connected to different pins of the audio input interface, and the other end is connected in series with a resistor to form a voltage divider point and connected to a voltage divider resistor. The other end of the voltage divider resistor is connected to a bias power supply. The protection circuit includes a bidirectional protection diode, one end of which is connected to the power supply module and the other end is grounded. The inverting input terminal of the first operational amplifier is connected to its output terminal. The first power supply terminal is connected to the power supply module and has a capacitor connected in parallel. The second power supply terminal is grounded.

[0058] Specifically, the first operational amplifier circuit of the audio signal receiving module includes a first operational amplifier U1.4. The audio signal is received through the audio input interface J1, and then transmitted to the signal filtering circuit. The specifications of the audio input interface J1 are PJ-611E_C41409495.

[0059] The filtering circuit includes capacitors C11 and C16. One end of C11 and C16 is connected to the pins of the audio input interface J1, and the other end is connected in series with resistors R10 and R28 to form a voltage divider point, which is then connected to voltage divider resistor R16. The other end of voltage divider resistor R16 is connected to a 6V bias voltage VIR6V. After the audio signal enters the filtering circuit, it is filtered by capacitors C11 and C16, and then input to the non-inverting input 5 of the first operational amplifier U1.4 through voltage divider resistor R16. R10 and R28 provide the bias voltage for the first operational amplifier U1.4. A connector CN1 with specifications of 250-2A is also connected between capacitor C11 and the audio input interface J1. The capacitance of capacitor C16 can be 47nF, and the capacitance of capacitor C11 is the same as that of C16, also 47nF. The resistance of resistor R10 can be 10KΩ, the resistance of resistor R16 can be 1MΩ, and the resistance of resistor R28 can be 10KΩ.

[0060] The protection circuit includes a bidirectional protection diode D1, one end of which is connected to the +12V of the power module, and the other end is grounded (GND), primarily serving as overvoltage protection. When an abnormality occurs at the audio input interface, the bidirectional protection diode D1 conducts, diverting the excessive voltage to ground to prevent damage to components in subsequent circuits, such as the first operational amplifier U1.4. The specifications for D1 can be BAT54S.

[0061] The inverting input terminal 6 and output terminal 7 of the first operational amplifier U1.4 are connected to form a negative feedback circuit structure to stabilize the amplification factor and other performance characteristics. Its first power supply terminal 4 is connected to the +12V of the power supply module and is connected in parallel with capacitor C10. The second power supply terminal 11 is grounded (GND). After receiving the audio signal processed by the filter circuit, the first operational amplifier U1.4 amplifies the audio signal and then transmits the processed audio signal to the subsequent module corresponding to the current operating mode. The model of U1.4 can be TL074CN, and the capacitance value of capacitor C10 can be 100nF.

[0062] It should be noted that the connection points in the diagram are used to illustrate the connection relationships between the modules. Figure 2 Connection point 1 in the middle is Figure 3 Connection point 1 in the middle.

[0063] Figure 3 A schematic diagram of the composition structure of the frequency band adjustment module of the effects unit according to an embodiment of the present disclosure is shown.

[0064] refer to Figure 3In one embodiment of this disclosure, the multi-frequency potentiometer includes a high-frequency potentiometer, an intermediate-frequency potentiometer, and a low-frequency potentiometer; the second operational amplifier circuit includes a second operational amplifier; one end of the high-frequency potentiometer is connected to the audio signal receiving module via a capacitor, and the other end is connected to the second operational amplifier via a frequency band adjustment auxiliary circuit; one end of the intermediate-frequency potentiometer is connected to the audio signal receiving module via a capacitor, and the other end is connected to the second operational amplifier via a frequency band adjustment auxiliary circuit; one end of the low-frequency potentiometer is connected to the audio signal receiving module via a capacitor, and the other end is connected to the second operational amplifier via a frequency band adjustment auxiliary circuit; the non-inverting input terminal of the second operational amplifier is connected to the frequency band adjustment auxiliary circuit via a resistor, and the inverting input terminal is connected to its output terminal via a parallel resistor and capacitor, and grounded via another resistor and capacitor.

[0065] Figure 3 Connection point 1 in the middle and Figure 2 Connection point 1 is the same point in the effect unit. Connection points 2 and 3 are connected to subsequent... Figure 4 Connection point 2 and connection point 3 are the same point. Connection point 2 is used to show the connection relationship between the frequency band adjustment module and the audio signal receiving module and the enclosure simulation module. Connection point 3 is used to show the connection relationship between the audio signal receiving module and the output module.

[0066] Specifically, the multi-frequency potentiometer includes a high-frequency potentiometer (treble) R2, an intermediate-frequency potentiometer (bass) R3, and a low-frequency potentiometer (mid) R4. One end of the high-frequency potentiometer R2 is connected to the output IMP_OUT of the audio signal receiving module via capacitor C2, and the other end is connected to the non-inverting input 10 of the second operational amplifier U1.1 via the frequency band adjustment auxiliary circuit. It is used to adjust the high-frequency gain of the audio signal. One end of the intermediate-frequency potentiometer R3 is connected to the output IMP_OUT of the audio signal receiving module, with the connection point between resistor R1 and capacitor C2. The other end is connected to the non-inverting input 10 of the second operational amplifier U1.1 via the frequency band adjustment auxiliary circuit. It is used to adjust the intermediate-frequency gain of the audio signal. One end of the low-frequency potentiometer R4 is connected to the output IMP_OUT of the audio signal receiving module via capacitor C3, and the other end is connected to the non-inverting input of the second operational amplifier U1.1 via the frequency band adjustment auxiliary circuit. It is used to adjust the low-frequency gain of the audio signal. C1 is the DC blocking capacitor of the frequency band adjustment circuit.

[0067] The second operational amplifier circuit includes a second operational amplifier U1.1. The non-inverting input terminal 10 of the second operational amplifier U1.1 is connected to the frequency band adjustment auxiliary circuit through a resistor R11, receiving the audio signal adjusted by the high-frequency, intermediate-frequency, and low-frequency potentiometers as the input signal of the operational amplifier. The inverting output terminal 9 of the second operational amplifier U1.1 is connected to its output terminal 8 through a parallel resistor R12 and a capacitor C8 to form a negative feedback loop, and is also grounded to GND through a series resistor R13 and a capacitor C6.

[0068] The resistance values ​​of resistors R11, R12, R13, high-frequency potentiometer R2, medium-frequency potentiometer R3, and low-frequency potentiometer R4 can be 220K, 150K, 12K, 100KB, 500KA, and 10KB, respectively. The capacitance values ​​of capacitors C1, C2, C3, and C6 can be 1nF, 47nF, 47nF, and 4.7nF, respectively.

[0069] The audio signal processed by the second operational amplifier U1.1 is used as the output signal of the frequency band adjustment module through its pin 8. It is output from the output terminal EQ_OUT of the frequency band adjustment module to the cabinet simulation module via the first relay K1.

[0070] refer to Figure 3 In one embodiment of this disclosure, the frequency band adjustment auxiliary circuit includes a first auxiliary branch, a second auxiliary branch, and a first voltage divider branch; the first auxiliary branch includes a capacitor and a resistor connected in series, the input terminal of the first auxiliary branch is connected to a high-frequency potentiometer, and the output terminal is connected to the non-inverting input terminal of a second operational amplifier; the first voltage divider branch includes a capacitor and a resistor connected in parallel, the input terminal of the first voltage divider branch is connected to a low-frequency potentiometer, and the output terminal is connected to the non-inverting input terminal of the second operational amplifier; the second auxiliary branch includes two resistors connected in series, the input terminal of the second auxiliary branch is connected to an intermediate-frequency potentiometer, and the output terminal is connected to the output terminal of the voltage divider branch.

[0071] Specifically, the frequency band adjustment auxiliary circuit includes a first auxiliary branch, a second auxiliary branch, and a first voltage divider branch. The first auxiliary branch consists of a capacitor C4 and a resistor R6 connected in series. Its input is connected to one end of the high-frequency potentiometer R2, and its output is connected to the non-inverting input 10 of the second operational amplifier U1.1. This is used to prevent excessive high-frequency gain from amplifying noise and to enhance high-frequency details (such as instrument overtones). The first voltage divider branch consists of a capacitor C7 and a resistor R14 connected in parallel. Its input is connected to the low-frequency potentiometer R4, and its output is connected to the non-inverting input 10 of the second operational amplifier U1.1. This is used to enhance low-frequency energy (such as drum beats, bass, etc.). Resistor R14 is connected to the bias voltage V1R6V. The second auxiliary branch consists of a resistor R7 and an adjustable resistor R9 connected in series. Its input is connected to the intermediate-frequency potentiometer R3, and its output is connected to the resistor R9. This is used to assist in adjusting the intermediate-frequency gain of the audio signal.

[0072] Among them, the capacitance values ​​of capacitors C4 and C7 can be 10nF and 47nF, respectively, and the resistance values ​​of resistors R6, R7, R9, and R14 can be 47K, 1.5M, 500K, and 1M, respectively.

[0073] In one embodiment of this disclosure, the first relay K1 is connected to the input terminal COB_IN of the enclosure simulation module, with specifications of HRS1H-S-DC12V. Its power supply terminals 5 and 2 are respectively connected to the RELAY+ and ground BATGND of the power supply module, including normally open contacts 4-3 and normally closed contacts 6-1.

[0074] Figure 4 A schematic diagram of the cabinet simulation module of the effect unit according to an embodiment of the present disclosure is shown.

[0075] refer to Figure 4 In one embodiment of this disclosure, the third operational amplifier circuit includes a third operational amplifier. The non-inverting input terminal of the third operational amplifier is connected to a bias voltage via a resistor, and the inverting input terminal is connected to a frequency band adjustment module via a resistor. The inverting input terminal is also connected to its output terminal via another resistor. The input terminal of the filter circuit is connected to the output terminal of the third operational amplifier, and includes a low-frequency filter branch, an intermediate-frequency filter branch, and a high-frequency filter branch. The low-frequency filter branch includes a capacitor and a resistor connected in series. The input terminal of the low-frequency filter branch is connected to the output terminal of the third operational amplifier, and the output terminal is connected to the input terminal of the intermediate-frequency filter branch. The intermediate-frequency filter branch... The circuit includes a series resistor and capacitor. The input of the intermediate frequency (IF) filter branch is connected to the low-frequency (LF) filter branch, and the output is connected to the input of the high-frequency (HF) filter branch. The HF filter branch includes a first HF filter branch and a second HF filter branch, which are connected in parallel. The input of the HF filter branch is connected to the output of the IF filter branch, and the output is connected to the inverting input and output of the fourth operational amplifier in the fourth operational amplifier circuit. The fourth operational amplifier circuit includes a fourth operational amplifier. The non-inverting input of the fourth operational amplifier is connected to the bias voltage through a resistor, and the output is connected to the output module.

[0076] Specifically, the third operational amplifier circuit includes a third operational amplifier U1.3. The non-inverting input terminal 12 of the third operational amplifier is connected to the bias voltage VIR6V through resistor R5, and the inverting input terminal 13 is connected to the frequency band adjustment module through resistor R22 (see reference). Figure 3 The circuit, connected to connection point 2 in this diagram, is also connected to its output terminal 14 via resistor R8, forming a negative feedback loop. Its first power supply terminal 4 and second power supply terminal 11 are connected to the power module and ground, respectively. The third operational amplifier U1.3 receives the audio signal output from the frequency band adjustment module, amplifies the audio signal, and stabilizes the amplification factor through negative feedback to ensure the signal meets the input requirements of subsequent filtering circuits.

[0077] The third operational amplifier is model TL074CN, and the resistance values ​​of resistors R5, R22, and R8 can be 10K, 100K, and 100K respectively.

[0078] The input of the filter circuit is connected to the output of the third operational amplifier U1.3, and it can be divided into a low-frequency filter branch, an intermediate-frequency filter branch, and a high-frequency filter branch. The low-frequency filter branch consists of a capacitor C13 and a resistor R19 connected in series. Its input is connected to output terminal 14 of the third operational amplifier U1.3, and its output is connected to the input of the intermediate-frequency filter branch. Resistor R19 is connected to the bias voltage VIR6V. The intermediate-frequency filter branch consists of a resistor R20 and a capacitor C14 connected in series. Its input is connected to the low-frequency filter branch, and its output is connected to the high-frequency filter branch. The high-frequency filter branch includes a first high-frequency filter branch and a second high-frequency filter branch connected in parallel. The first high-frequency filter branch consists of R21, C15, and R24 connected in series, and the second high-frequency filter branch consists of R23 and C12. The input of the high-frequency filter branch is connected to the output of the intermediate-frequency filter branch, and its output is connected to the inverting input terminal 2 and the output terminal 1 of the fourth operational amplifier U1.2 in the fourth operational amplifier circuit.

[0079] Among them, the capacitance values ​​of capacitors C13, C14, C15, and C12 can be 10nF, 1nF, 1nF, and 1nF, respectively, and the resistance values ​​of resistors R19, R20, R21, R23, and R24 can be 680K, 100K, 150K, 300K, and 6.2K, respectively.

[0080] The fourth operational amplifier circuit includes the fourth operational amplifier U1.2. The non-inverting input terminal 3 of the fourth operational amplifier is connected to the bias voltage VIR6V through resistor R25. The output terminal 1 serves as the output terminal COB_OUT of the enclosure analog module and is connected to the output module through the second relay K2.

[0081] refer to Figure 4 In one embodiment of this disclosure, the enclosure simulation module further includes a second voltage divider branch, which includes a voltage divider network composed of two resistors connected in series. The input end of the voltage divider network is connected to the power supply module, and the output end is grounded. A capacitor is connected in parallel to the resistor near the ground end in the voltage divider network.

[0082] Specifically, the enclosure simulation module also includes a second voltage divider branch, which is composed of resistors R17 and R18 connected in series. One end of resistor R17 is connected to the +12V of the power supply module, and the other end is connected to resistor R18. Resistor R18 is also connected in parallel with capacitor C9. The resistance values ​​of resistors R17 and R18 can be 10KΩ and 10KΩ respectively, and the capacitance value of capacitor C9 can be 100uF.

[0083] In one embodiment of this disclosure, the second relay K2 is connected to the output terminal COB_OUT of the enclosure simulation module, with specifications of HRS1H-S-DC12V. Its power supply terminals 5 and 2 are respectively connected to the RELAY2+ and ground BATGND of the power supply module, including normally open contacts 4-3 and normally closed contacts 6-1.

[0084] Figure 5 A schematic diagram of the composition structure of the output module of the effect unit according to an embodiment of the present disclosure is shown.

[0085] refer to Figure 5 In one embodiment of this disclosure, the positive input terminal of the power amplifier is connected to the audio signal receiving module and the enclosure analog module through a series adjustable resistor and capacitor, the inverting input terminal is grounded, the positive output terminal and the inverting output terminal are connected to the sound-generating device through a device interface, the first power supply terminal is connected to the power supply module, and the second power supply terminal is grounded.

[0086] Specifically, the positive input terminal In+ of the output module's power amplifier U2, i.e., the TPA3110D2 (power amplifier) ​​module, is connected to the enclosure analog module through a series adjustable resistor R27 and capacitor C17 (see connection point 4 for details). Figure 5 Connection point 4 in Figure 4 (Connection point 4 in the diagram is the same point). Adjustable resistor R27 is used to adjust the amplitude of the input signal, and capacitor C17 is used to block DC and pass AC, preventing DC components from entering the power amplifier module and affecting its normal operation. The inverting input terminal In- of the power amplifier is grounded to GND. The positive output terminal Out+ and the inverting output terminal Out- are connected to the sound-producing device through device interface P1 (CH3.96-2P ZZ) to provide the amplified audio signal. The first power supply terminal VCC is connected to the +12V of the power module, providing the positive voltage required for the power amplifier module to operate. The second power supply terminal GND is grounded to BATGND. The power amplifier also includes a first switch S1 and a second switch S2, which are connected to an external control unit via pins 7 and 8 respectively, or used as external control buttons for user adjustment.

[0087] The specifications of device interface P1 can be CH3.96-2P ZZ, the capacitance of capacitor C17 can be 22nF, and the resistance of resistor R27 can be 47KA.

[0088] Figure 6 A schematic diagram of the power module composition of an effect unit according to an embodiment of the present disclosure is shown.

[0089] refer to Figure 6In one embodiment of this disclosure, the effects unit further includes a power module, which includes a charging module, an external power input connector, and a toggle switch. The charging module is connected to the power bus via a pin connected in parallel with the external power input connector. One end of the toggle switch is connected to the power bus, which is connected to the audio signal receiving module, the frequency band adjustment module, the cabinet simulation module, and the output module, and is used to provide power input to the audio signal receiving module, the frequency band adjustment module, the cabinet simulation module, and the output module. The toggle switch includes a first position, a second position, a third position, and a fourth position. The first position is the power neutral position, used to disconnect the power supply. The second position is connected to the second relay, used to control the second relay to be energized. The third position is the relay neutral position, used to control the first and second relays to be de-energized. The fourth position is connected to the first relay, used to control the first relay to be energized.

[0090] Specifically, the effects unit also includes a power module, which comprises a charging module U3, an external power input connector DC1, and a toggle switch H2. Pin 1 (VIN) of the charging module U3 receives the input voltage, pin 2 (GND) is grounded, and pin 3 (B+) is connected to the +12V power bus via the first position (1) of the toggle switch H2. It also receives the 12V voltage (BAT1) from an external battery and is connected to the positive terminal (1) of battery H1. Pin 4 (B-) is connected to the negative terminal (2) of battery H1. The charging module U3 also includes a negative temperature coefficient thermistor interface (NTC) and a monitoring pin (BM). When charging with an external charger, the external power input connector DC1 is connected to pin 3 through the path between pin 3 and battery H1; the charging module U3, resistor R15, and LED2 are not soldered. When charging with USB Type-C, resistor R15 and LED2 are soldered to pin 5 (GND) and pin 7 (LED) of the charging module. The charging module U3 is connected to the +12V power bus via a pin connected in parallel with the external power input connector DC1.

[0091] A toggle switch H2 is provided between the charging module U3 and the external power input connector DC1 and the +12V power bus. The toggle switch H2 includes a first position 1, a second position 2, a third position 3, and a fourth position 4. The first position 1 is the power off position, used to disconnect the power. The second position 2 is connected to the second relay K1 through diode D2, providing the second relay K2 with the power input RELAY2+. The third position is the relay off position, connected to the +12V power bus through diode D3, used to control the first and second relays to be de-energized. The fourth position is connected to the first relay K1 through diode D4, used to provide the first relay K1 with the power input RELAY+.

[0092] Among them, the resistance of resistor R15 can be 100Ω, the specification of LED can be XL-302SURD, the specification of external power input connector DC1 is DC-005-2.5A-2.5, the specification of battery H1 is XH2.54-2P, the specification of toggle switch is BX-XH2.54-4PZZ, and the specification of diodes D2, D3, and D4 can be SS54F_C108841.

[0093] Based on the aforementioned effects processor, this disclosure also provides a speaker that includes the aforementioned effects processor.

[0094] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this disclosure can be achieved, and this is not limited herein.

[0095] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0096] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. An effects device, characterized in that The effector includes: An audio signal receiving module is connected to a frequency band adjustment module, a cabinet simulation module, and an output module via a first relay and a second relay. It includes an audio input interface and a first operational amplifier circuit. The module receives audio signals and switching signals from a toggle switch via the audio input interface and controls the on / off state of the first and second relays based on the switching signals, thereby controlling the working mode of the effects unit by controlling the on / off state of the first and second relays. The frequency band adjustment module is connected to the audio signal receiving module and the enclosure simulation module, and includes a multi-frequency potentiometer and a second operational amplifier circuit, used to adjust the gain of different frequency bands of the audio signal through the multi-frequency potentiometer and the second operational amplifier circuit; The enclosure simulation module is connected to the audio signal receiving module, the frequency band adjustment module and the output module. It includes a third operational amplifier circuit, a filter circuit and a fourth operational amplifier circuit connected in series. It is used to simulate the audio signal according to the frequency response characteristics of the target speaker and transmit the processed audio signal to the output module. The output module is connected to the audio signal receiving module, the enclosure simulation module, and the sound-generating device. It includes a power amplifier for amplifying the processed audio signal based on the power amplifier and transmitting it to the sound-generating device so that the sound-generating device can play the audio signal.

2. The effects device of claim 1, wherein The input terminal of the first relay is connected to the output terminal of the audio signal receiving module, the normally open contact is connected to the input terminal of the frequency band adjustment module, and the normally closed contact is connected to the input terminal of the enclosure simulation module. The input terminal of the second relay is connected to the output terminal of the frequency band adjustment module and the output terminal of the audio signal receiving module, the normally open contact is connected to the input terminal of the enclosure simulation module, and the normally closed contact is connected to the input terminal of the output module.

3. The effects device of claim 1, wherein The first operational amplifier circuit includes a first operational amplifier, and the audio input interface is connected to the non-inverting input terminal of the first operational amplifier through a signal filtering circuit and a protection circuit; The signal filtering circuit includes two capacitors. One end of each capacitor is connected to a different pin of the audio input interface. The other end of each capacitor is connected in series with a resistor to form a voltage divider point and is connected to the voltage divider resistor. The other end of the voltage divider resistor is connected to the bias power supply. The protection circuit includes a bidirectional protection diode, one end of which is connected to the power module and the other end is grounded; The inverting input terminal of the first operational amplifier is connected to its output terminal, the first power supply terminal is connected to the power supply module and has a capacitor connected in parallel, and the second power supply terminal is grounded.

4. The effects device of claim 1, wherein The multi-frequency potentiometer includes a high-frequency potentiometer, an intermediate-frequency potentiometer, and a low-frequency potentiometer; the second operational amplifier circuit includes a second operational amplifier. One end of the high-frequency potentiometer is connected to the audio signal receiving module via a capacitor, and the other end is connected to the second operational amplifier via a frequency band adjustment auxiliary circuit. One end of the intermediate frequency potentiometer is connected to the audio signal receiving module, and the other end is connected to the second operational amplifier through the frequency band adjustment auxiliary circuit. One end of the low-frequency potentiometer is connected to the audio signal receiving module via a capacitor, and the other end is connected to the second operational amplifier via the frequency band adjustment auxiliary circuit; The non-inverting input of the second operational amplifier is connected to the frequency band adjustment auxiliary circuit through a resistor, and the inverting input is connected to its output through a parallel resistor and capacitor, and grounded through another resistor and capacitor.

5. The effects device of claim 4, wherein, The frequency band adjustment auxiliary circuit includes a first auxiliary branch, a second auxiliary branch, and a first voltage divider branch; The first auxiliary branch includes a capacitor and a resistor connected in series. The input terminal of the first auxiliary branch is connected to the high-frequency potentiometer, and the output terminal is connected to the non-inverting input terminal of the second operational amplifier. The first voltage divider branch includes a capacitor and a resistor connected in parallel. The input terminal of the first voltage divider branch is connected to the low-frequency potentiometer, and the output terminal is connected to the non-inverting input terminal of the second operational amplifier. The second auxiliary branch includes two resistors connected in series. The input terminal of the second auxiliary branch is connected to the intermediate frequency potentiometer, and the output terminal is connected to the output terminal of the voltage divider branch.

6. The effects device of claim 1, wherein The third operational amplifier circuit includes a third operational amplifier. The non-inverting input terminal of the third operational amplifier is connected to a bias voltage through a resistor, and the inverting input terminal is connected to the frequency band adjustment module through a resistor. The inverting input terminal is also connected to its output terminal through another resistor. The input terminal of the filtering circuit is connected to the output terminal of the third operational amplifier, and includes a low-frequency filtering branch, an intermediate-frequency filtering branch, and a high-frequency filtering branch. The low-frequency filtering branch includes a capacitor and a resistor connected in series. The input terminal of the low-frequency filtering branch is connected to the output terminal of the third operational amplifier, and the output terminal is connected to the input terminal of the intermediate-frequency filtering branch. The intermediate-frequency filtering branch includes a resistor and a capacitor connected in series. The input terminal of the intermediate-frequency filtering branch is connected to the low-frequency filtering branch, and the output terminal is connected to the input terminal of the high-frequency filtering branch. The high-frequency filtering branch includes a first high-frequency filtering branch and a second high-frequency filtering branch connected in parallel. The input terminal of the high-frequency filtering branch is connected to the output terminal of the intermediate-frequency filtering branch, and the output terminal is connected to the inverting input terminal and the output terminal of the fourth operational amplifier of the fourth operational amplifier circuit. The fourth operational amplifier circuit includes the fourth operational amplifier, the non-inverting input terminal of the fourth operational amplifier is connected to the bias voltage through a resistor, and the output terminal is connected to the output module.

7. The effects device of claim 5, wherein, The enclosure simulation module also includes a second voltage divider branch, which includes a voltage divider network consisting of two resistors connected in series. The input end of the voltage divider network is connected to the power supply module, and the output end is grounded. A capacitor is connected in parallel with the resistor near the ground end in the voltage divider network.

8. The effects device of claim 1, wherein The positive input terminal of the power amplifier is connected to the audio signal receiving module and the enclosure analog module through a series adjustable resistor and capacitor. The inverting input terminal is grounded. The positive output terminal and the inverting output terminal are connected to the sound-generating device through a device interface. The first power supply terminal is connected to the power supply module, and the second power supply terminal is grounded.

9. The effects device of claim 1, wherein, The effects unit also includes a power module, which comprises a charging module, an external power input connector, and the toggle switch. The charging module is connected to the power bus via a pin connected in parallel with the external power input connector. One end of the toggle switch is connected to the power bus. The power bus is connected to the audio signal receiving module, the frequency band adjustment module, the cabinet simulation module, and the output module, and is used to provide power input to the audio signal receiving module, the frequency band adjustment module, the cabinet simulation module, and the output module. The toggle switch includes a first position, a second position, a third position, and a fourth position. The first position is the power off position, used to disconnect the power supply. The second position is connected to the second relay and used to control the second relay to be energized. The third position is the relay off position, used to control the first relay and the second relay to be de-energized. The fourth position is connected to the first relay and used to control the first relay to be energized.

10. A sound box, characterized in that, Includes the effect unit as described in any one of claims 1-9.

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