Portable guitar amplifier pedal effector

Abstract

The utility model relates to a portable guitar amplifier pedal effector, which comprises a digital audio processing circuit electrically connected with a sound source, a selectable power output module and a selectable tone adjusting module which are electrically connected with the digital audio processing circuit, and a sound box electrically connected with the selectable power output module and the selectable tone adjusting module, the sound boxes are 8-omega sound boxes and 16-omega sound boxes; the digital audio processing circuit comprises a DSP audio processor chip U1, the 13-16 pins of the U1 are used for being matched with a 16-ohm sound box, and the 9-12 pins of the U1 are used for being matched with a 8-ohm sound box. The device is simple in structure and low in manufacturing cost, parts are easy to replace, the pedal form is adopted, the size is small, carrying is convenient, the output power can reach 100 W, and the requirements of various occasions are met.

Description

Technical Field

[0001] The present patent application belongs to the technical field of guitar amplifier effect device, and more specifically, relates to a portable guitar amplifier pedal effect device. Background Art

[0002] With the continuous development of society and the improvement of living standards, people have begun to generally pursue the enjoyment of the spiritual world. Entertainment equipment has emerged and is gradually increasing. Guitar is a typical entertainment equipment. In some occasions, guitars need to be paired with guitar amplifiers for performances. At present, most of the guitar amplifiers on the market are made of transistors or tubes. Products using transistors or tubes are generally large and not easy to carry, so they are mostly used for large-scale performances. However, they are not very convenient for some occasions with limited venues, such as mobile performances, daily home use and practice, and cannot meet specific needs. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a portable guitar amplifier foot pedal effector, which is in the form of a pedal and is not only small in size and easy to carry, but also has an output power of up to 100W, meeting the needs of various occasions.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is:

[0005] A portable guitar amplifier pedal effector comprises a digital audio processing circuit electrically connected to a sound source, an optional power output module and an optional tone adjustment module electrically connected to the digital audio processing circuit, and a speaker electrically connected to the optional power output module and the optional tone adjustment module, wherein the speaker is an 8Ω or 16Ω speaker;

[0006] The digital audio processing circuit includes a DSP audio processor chip U1, and the 13-16 pins of U1 are used to match a 16Ω speaker, and the 9-12 pins of U1 are used to match an 8Ω speaker;

[0007] Pin 16 of U1 is connected to resistors R19 and R22, and the other end of resistor R19 is connected to pin 13 of U1; the other end of resistor R22 is connected to resistor R23, diode D4 and then connected to +75V, the other end of resistor R23 is connected to pin 15 of U1, capacitor C12, capacitor C13, voltage-stabilizing diode ZD1 and diode D5, the other end of capacitor C12, the other end of capacitor C13 and the other end of voltage-stabilizing diode ZD1 are all connected to pin 13 of U1; the other end of diode D5 is connected to pin 12 of U1 through resistors R24 and R20; the other end of diode D4 is connected to diode D5 through resistor R79, and resistor R79 is also connected in parallel with resistor R26; diode The other end of D4 is also connected to the 2nd pin of MOS field effect tube Q4 (+75V), resistor R32, polar capacitor E4, capacitor C18, and diode D9. The other end of resistor R32 is connected to the 13th pin of U1 through capacitor C16. The other end of polar capacitor E4 and the other end of capacitor C18 are both grounded. The other end of diode D9 is connected to the 13th pin of U1 through inductor L1. The 3rd pin of MOS field effect tube Q4 is connected to the 13th pin of U1, and the 1st pin of MOS field effect tube Q4 is connected to the 14th pin of U1 through resistor R28 and diode D6 respectively. The 3rd pin of MOS field effect tube Q4 is also connected to resistor R28 through resistor R30. The 5th pin of U1 is connected to the sound source.

[0008] The output end of the inductor L1 is also connected to the inductor L2 and the W3 pin of the terminal line. The W1 pin of the terminal line is connected to the inductor L3, the 13 pin of U1, and the IN- pin of U1. The W2 pin of the terminal line is connected to the other end of the inductor L3 and the 1 pin of the trigger JK1. The 4 pin of the trigger JK1 is connected to the SENSE SPK1 pin of the sound source and +5V.

[0009] Pin 9 of U1 is connected to -75V through resistor R16. Pin 9 of U1 is also connected to resistor R17. The other end of resistor R17 is connected to capacitor C10, capacitor C11, and pin 12 of U1. The other end of capacitor C10, capacitor C11, and the other end of pin 10 of U1 are all connected to -75V. Pin 12 of U1 is also connected to resistor R20. The other end of resistor R20 is connected to resistor R24 ​​and the emitter of transistor Q3. The other end of resistor R24 ​​is connected to diode D5. The collector of transistor Q3 is grounded through resistor R27, and the base is connected to -75V.

[0010] Pin 11 of U1 is connected to resistor R29 and diode D7. The other end of resistor R29 and the other end of diode D7 are both connected to pin 1 of MOS field effect transistor Q5. Pin 1 of MOS field effect transistor Q5 is also connected to -75V and pin 3 of MOS field effect transistor Q5 through resistor R31. Pin 2 of MOS field effect transistor Q5 is also connected to pin 3 of MOS field effect transistor Q5.

[0011] The W4 pin of the terminal line is connected to the 5 pin of the trigger JK2, and the 4 pin of the trigger JK2 is connected to the SENSE SPK2 pin of the sound source and +5V;

[0012] Trigger JK1 and trigger JK2 are equipped with 16Ω and 8Ω speakers respectively.

[0013] Furthermore, the DSP audio processor chip U1 is IRS2092STRPBF.

[0014] Furthermore, the output power of the optional power output module is 1W, 20W, and 100W.

[0015] Furthermore, the optional tone adjustment module includes three tones: USA, UK, and FLAT, wherein the FLAT tone is electrically connected to the speaker through a tube power amplifier; the USA tone and the UK tone are both electrically connected to the speaker.

[0016] Further, the tube power amplifier is used to achieve five distinct real tube responses, namely: KT88, 6L6, EL34, 6V6, EL84.

[0017] Furthermore, the sound source includes but is not limited to one or more of a microphone, a guitar, a microphone, and a headphone socket for a mobile phone.

[0018] Furthermore, it also includes a shell, which is used to accommodate the above-mentioned circuit or module, and the shell is a foot pedal.

[0019] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are:

[0020] The output power of this device can reach 100W, and there is no venue restriction. It weighs only 1.28Kg and has a volume of 200x81x 149mm. It is small and easy to carry, which effectively solves the problem that traditional guitar amplifiers are bulky and inconvenient to carry for mobile singers and daily home practice.

[0021] In pedal form, the compact design turns any pedalboard, modeler or multi-effects unit into a high-performance amplifier, ensuring users can take their sound with them.

[0022] The power selector switch allows the user to choose between 1W, 20W or 100W, making it easy to achieve the perfect balance of power and response in any scenario, such as at home, in the studio and on stage. With a unique high dynamic headroom design, the output is not affected even at 16Ω, and maximum power and best sound can be obtained through any 8 or 16Ω cabinet.

[0023] Using the DSP audio processor chip IRS2092STRPBF, signal processing includes balance, mixing, bass enhancement, multi-band dynamic processing, delay compensation and stereo image expansion, etc. It can compensate for the limitations of real-world speakers, amplifiers and listening environments, and dynamically improve the perceived audio quality.

[0024] The post-stage tube simulation response control provides five completely different real tube responses - KT88, 6L6, EL34, 6V6, EL84, and has the function of switching tones with one button. Users can switch to the desired performance tone with one button, simplifying the process and becoming a powerful tool for live performances. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a control flow chart of the utility model.

[0026] Figure 2 The control flow chart of the utility model after adding a tube power amplifier.

[0027] Figure 3 This is a digital audio processing circuit 1 of the utility model.

[0028] Figure 4 This is the second digital audio processing circuit of the utility model.

[0029] Figure 5 The circuit of the optional power output module of the utility model Figure 1 .

[0030] Figure 6 The circuit of the optional power output module of the utility model Figure 2 .

[0031] Figure 7 The circuit of the optional tone adjustment module of the utility model Figure 1 .

[0032] Figure 8 The circuit of the optional tone adjustment module of the utility model Figure 2 .

[0033] Fig. 9 The utility model is a circuit diagram of the electronic tube power amplifier. DETAILED DESCRIPTION

[0034] The utility model is further described in detail below in conjunction with the embodiments.

[0035] A portable guitar amplifier pedal effector, such as Figure 1 , including a digital audio processing circuit electrically connected to a sound source (various audio signals), an optional power output module and an optional tone adjustment module electrically connected to the digital audio processing circuit, and a speaker electrically connected to the optional power output module and the optional tone adjustment module, the speaker being an 8Ω and 16Ω speaker. Of course, there is also an analog-to-digital / digital-to-analog conversion circuit between the sound source and the digital audio processing circuit, which is a conventional design and will not be described here.

[0036] like Figure 3 The digital audio processing circuit includes a DSP audio processor chip U1. Pins 13-16 of U1 are used to match a 16Ω speaker. Figure 3 The upper part of U1, pins 9-12 are used to match the 8Ω speaker, that is, Figure 3 The lower half.

[0037] Figure 3 for Figure 4 Part of the circuit in Figure 3 , Figure 4 In the example, the 16th pin of the DSP audio processor chip U1 is connected to resistors R19 and R22, and the other end of resistor R19 is connected to pin 13 of U1; the other end of resistor R22 is connected to resistor R23, diode D4 and then connected to +75V, the other end of resistor R23 is connected to pin 15 of U1, capacitor C12, capacitor C13, voltage-stabilizing diode ZD1 and diode D5, the other end of capacitor C12, the other end of capacitor C13 and the other end of voltage-stabilizing diode ZD1 are all connected to pin 13 of U1; the other end of diode D5 is connected to pin 12 of U1 through resistors R24 and R20; the other end of diode D4 is connected to diode D5 through resistor R79, and resistor R79 is also connected in parallel with resistor R 26; the other end of the diode D4 is also connected to the 2nd pin (+75V) of the MOS field effect tube Q4, the resistor R32, the polar capacitor E4, the capacitor C18, and the diode D9. The other end of the resistor R32 is connected to the 13th pin of U1 through the capacitor C16; the other end of the polar capacitor E4 and the other end of the capacitor C18 are both grounded; the other end of the diode D9 is connected to the 13th pin of U1 through the inductor L1; the 3rd pin of the MOS field effect tube Q4 is connected to the 13th pin of U1, and the 1st pin of the MOS field effect tube Q4 is connected to the 14th pin of U1 through the resistor R28 and the diode D6 respectively; the 3rd pin of the MOS field effect tube Q4 is also connected to the resistor R28 through the resistor R30; the 5th pin of U1 is connected to the sound source.

[0038] The output end of inductor L1 is also connected to inductor L2 and W3 pin of the terminal line. The W1 pin of the terminal line is connected to inductor L3, pin 13 of U1, and IN- pin of U1. The W2 pin of the terminal line is connected to the other end of inductor L3 and pin 1 of trigger JK1. Pin 4 of trigger JK1 is connected to SENSE SPK1 pin of the sound source and +5V.

[0039] Pin 9 of U1 is connected to -75V through resistor R16. Pin 9 of U1 is also connected to resistor R17. The other end of resistor R17 is connected to capacitor C10, capacitor C11, and pin 12 of U1. The other end of capacitor C10, capacitor C11, and the other end of pin 10 of U1 are all connected to -75V. Pin 12 of U1 is also connected to resistor R20. The other end of resistor R20 is connected to resistor R24 ​​and the emitter of transistor Q3. The other end of resistor R24 ​​is connected to diode D5. The collector of transistor Q3 is grounded through resistor R27, and the base is connected to -75V.

[0040] Pin 11 of U1 is connected to resistor R29 and diode D7. The other end of resistor R29 and the other end of diode D7 are both pin 1 of MOS field effect transistor Q5. Pin 1 of MOS field effect transistor Q5 is also connected to -75V and pin 3 of MOS field effect transistor Q5 through resistor R31 respectively. Pin 2 of MOS field effect transistor Q5 is also connected to pin 3 of MOS field effect transistor Q5.

[0041] The W4 pin of the terminal line is connected to the 5 pin of the trigger JK2, and the 4 pin of the trigger JK2 is connected to the SENSE SPK2 pin and +5V of the sound source.

[0042] Trigger JK1 and trigger JK2 are equipped with 16Ω and 8Ω speakers respectively.

[0043] Preferably, the DSP audio processor chip U1 is IRS2092STRPBF.

[0044] like Figure 5 , Figure 6 The output power of the optional power output module is 1W, 20W, and 100W, which is converted by switching switch SW2.

[0045] like Figure 2 The optional tone adjustment module includes three tones: USA, UK, and FLAT. The FLAT tone is electrically connected to the speaker through a tube power amplifier; the USA tone and UK tone are both electrically connected to the speaker. Figure 7 , Figure 8 The circuit structures of the optional tone adjustment modules are shown respectively, and the switching is performed by switching the switch SW1. Fig. 9 In the video, the tube power amplifier is used to achieve five completely different real tube responses, namely: KT88, 6L6, EL34, 6V6, EL84, each displayed using a corresponding LED light.

[0046] The sound source includes but is not limited to one or more of a microphone, a guitar, a microphone, and a headphone socket for a mobile phone.

[0047] During processing and manufacturing, in order to facilitate use, the effector also includes a shell, which is used to accommodate the above-mentioned circuit or module. The shell is in the style of a foot pedal, which is more convenient for on-site application.

[0048] For example, Figure 5 and Figure 6 It shows how to switch between 1W / 20W / 100W: After the audio signal is converted from analog to digital, it enters the shift register 74HC165PW for storage. Then, the stored data can be read simultaneously through the parallel output pins SW_POWER0 or SW_POWER 1, and the desired output power can be selected by switching the switch SW2.

[0049] Figure 7 and Figure 8 It shows how to switch between USA / UK / FLAT: Same as above, the audio signal is converted from analog to digital and then enters the 74HC165PW shift register for storage. Then the stored data can be read simultaneously through the parallel output pins SW_VOICE 0 or SW_VOICE 1, and the desired output power can be selected by switching the switch SW2. This IC is very useful for devices that need to receive a large number of input signals.

[0050] This device has the following advantages:

[0051] 1. The power selection switch allows the user to choose between 1W, 20W or 100W of power, making it easy to achieve the perfect balance of power and response in any scenario, such as at home, in the studio and on stage. It has a unique high dynamic headroom design that does not affect the output even at 16Ω. You can get maximum power and best sound through any box with 8 or 16Ω.

[0052] CabRig was chosen as the DSP speaker simulator, which recreates the sound and feel of microphones and guitars in incredible detail. While impulse response (IR) based speaker simulators are a good snapshot of a setup, they have inherent latency and potential phase issues when mixing multiple speakers. The corresponding software algorithm simulates the speakers, cabinets, microphones and rooms, which can produce incredible detail, effectively achieving zero latency, no phase mismatch, and more flexibility than "snapshot" IRs. CabRig allows users to choose to equip a variety of different on-axis and off-axis microphones. Users can also choose the style and size of the room, and have full control over these effects. The degree of integration of the simulator with the recording console style master EQ. CabRig is accessible through Architect software, which is available for PC and Mac, compatible with the latest and future operating systems, including Mac OS Catalina and Big Sur.

[0053] It uses IRS2092STRPBF, a DSP audio processor chip produced by Infineon Technologies. Signal processing includes balance, mixing, bass enhancement, multi-band dynamic processing, delay compensation, and stereo image expansion, which can compensate for the limitations of real-world speakers, amplifiers, and listening environments, and dynamically improve the perceived audio quality.

[0054] The post-amp tube simulation response control provides five distinct authentic tube responses - KT88, 6L6, EL34, 6V6, EL84. Each setting provides the response, dynamics, droop and break characteristics of the selected tube power amp. Linear response provides transparent power amplification and is used in conjunction with FLAT tone when pairing an electric guitar amp with an external amp modeler.

[0055] One-touch to switch tones. The machine has preset American, British and FLAT preamplifier tones. Users can switch to the desired performance tone with one click, simplifying it and making it a great tool for live performances.

[0056] The use process of this device is the process of signal processing: an analog signal (such as a guitar signal) is input to the IN port on the rear panel, amplified by the pre-stage, processed by the high, medium and low frequencies, and then amplified by the post-stage, and finally output to the 8-ohm or 16-ohm speaker port. An external speaker is required to produce sound. In order to obtain the desired timbre of consumers, three sounds of UK, USA and FLAT are specially added for selection. Since the timbre of different types of tubes is also different, there are a total of 6 timbre of tubes to choose from, which can not only obtain the maximum power and the best timbre, but also is easy to use and carry.

Claims

1. A portable guitar amplifier pedal effector, characterized in that: It includes a digital audio processing circuit electrically connected to the sound source, an optional power output module and an optional tone adjustment module electrically connected to the digital audio processing circuit, and a speaker electrically connected to the optional power output module and the optional tone adjustment module, wherein the speaker is an 8Ω speaker and a 16Ω speaker; The digital audio processing circuit includes a DSP audio processor chip U1, and the 13-16 pins of U1 are used to match a 16Ω speaker, and the 9-12 pins of U1 are used to match an 8Ω speaker; Pin 16 of U1 is connected to resistors R19 and R22. The other end of resistor R19 is connected to pin 13 of U1. The other end of resistor R22 is connected to resistor R23, diode D4 and then connected to +75V. The other end of resistor R23 is connected to pin 15 of U1, capacitor C12, capacitor C13, voltage regulator diode ZD1 and diode D5. The other end of capacitor C12, the other end of capacitor C13 and the other end of voltage regulator diode ZD1 are all connected to pin 13 of U1. The other end of diode D5 is connected to pin 12 of U1 through resistors R24 and R20. The other end of diode D4 is connected to diode D4 through resistor R79. The diode D5 and the resistor R79 are also connected in parallel with the resistor R26; the other end of the diode D4 is also connected to the 2nd pin of the MOS field effect tube Q4, the resistor R32, the polar capacitor E4, the capacitor C18, and the diode D9, and the other end of the resistor R32 is connected to the 13th pin of U1 through the capacitor C16; the other end of the polar capacitor E4 and the other end of the capacitor C18 are both grounded; the other end of the diode D9 is connected to the 13th pin of U1 through the inductor L1; the 3rd pin of the MOS field effect tube Q4 is connected to the 13th pin of U1, and the 1st pin of the MOS field effect tube Q4 is connected to the 14th pin of U1 through the resistor R28 and the diode D6 respectively; Pin 3 of MOS field effect tube Q4 is also connected to resistor R28 through resistor R30; Pin 5 of U1 is connected to the sound source; The output end of the inductor L1 is also connected to the inductor L2 and the W3 pin of the terminal line. The W1 pin of the terminal line is connected to the inductor L3, the 13 pin of U1, and the IN- pin of U1. The W2 pin of the terminal line is connected to the other end of the inductor L3 and the 1 pin of the trigger JK1. The 4 pin of the trigger JK1 is connected to the SENSE SPK1 pin of the sound source and +5V. Pin 9 of U1 is connected to -75V through resistor R16. Pin 9 of U1 is also connected to resistor R17. The other end of resistor R17 is connected to capacitor C10, capacitor C11, and pin 12 of U1. The other end of capacitor C10, capacitor C11, and the other end of pin 10 of U1 are all connected to -75V. Pin 12 of U1 is also connected to resistor R20. The other end of resistor R20 is connected to resistor R24 ​​and the emitter of transistor Q3. The other end of resistor R24 ​​is connected to diode D5. The collector of transistor Q3 is grounded through resistor R27, and the base is connected to -75V. Pin 11 of U1 is connected to resistor R29 and diode D7. The other end of resistor R29 and the other end of diode D7 are both connected to pin 1 of MOS field effect transistor Q5. Pin 1 of MOS field effect transistor Q5 is also connected to -75V and pin 3 of MOS field effect transistor Q5 through resistor R31. Pin 2 of MOS field effect transistor Q5 is also connected to pin 3 of MOS field effect transistor Q5. The W4 pin of the terminal line is connected to the 5 pin of the trigger JK2, and the 4 pin of the trigger JK2 is connected to the SENSE SPK2 pin of the sound source and +5V; Trigger JK1 and trigger JK2 are equipped with 16Ω and 8Ω speakers respectively; The DSP audio processor chip U1 is IRS2092STRPBF.

2. A portable guitar amplifier pedal effector according to claim 1, characterized in that: The output powers of the optional power output modules are 1W, 20W, and 100W.

3. A portable guitar amplifier pedal effector according to claim 1, characterized in that: The optional tone adjustment module includes three tones: USA, UK, and FLAT. The FLAT tone is electrically connected to the speaker through a tube power amplifier; the USA tone and the UK tone are both electrically connected to the speaker.

4. A portable guitar amplifier pedal effector according to claim 3, characterized in that: The tube power amplifier is used to achieve five completely different real tube responses: KT88, 6L6, EL34, 6V6, EL84.

5. A portable guitar amplifier pedal effector according to any one of claims 1 to 4, characterized in that: Sound sources include microphone, guitar, and mobile phone with headphone jack.

6. A portable guitar amplifier pedal effector according to claim 5, characterized in that: It also includes a shell, which is used to accommodate the above-mentioned circuit or module, and the shell is a foot pedal.

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