signal conversion device

Abstract

To provide a signal conversion device capable of converting a signal from an electric guitar into a signal that is like a signal output from a microphone receiving a sound emitted from a speaker, without emitting a large volume and without being affected by external noise. [Solution] The device has a speaker (10) housed within a case (100), a drive circuit (11) that drives the speaker (10) based on a signal output from an electric guitar (200), and a magnetic pickup (12) that is housed within the case (100) and positioned opposite the speaker (10), and is configured to convert the signal output from the electric guitar (200) into a signal from the magnetic pickup (12).

Description

[Technical Field]

[0001] The present invention relates to a signal conversion device that converts a signal output from an electric guitar. [Background technology]

[0002] When playing an electric guitar, as described in Patent Document 1, for example, the signal output from the electric guitar is amplified by a guitar amplifier, and the performance sound based on the amplified signal is output from a speaker. Generally, when playing, a loud sound is emitted from the speaker. Furthermore, for example, when recording, the loud sound is converted into an electrical signal in a studio through a microphone such as a dynamic microphone, and the electrical signal is recorded (recorded) on a recording medium. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7432131 Publication Summary of the Invention [Problem to be solved by the invention]

[0004] When recording an electric guitar performance, a studio is required to capture the high volume of the sound and prevent it from leaking out, in order to obtain a realistic sound. Recording in a studio is also essential to prevent the intrusion of noise. However, for amateur performers, setting up a studio every time they want to record their own performance is a costly burden.

[0005] The present invention has been made in view of the above, and provides a signal conversion device that can convert a signal from an electric guitar into a signal that sounds like a signal output from a microphone receiving sound emitted from a speaker, without emitting a large volume and without being affected by external noise. [Means for solving the problem]

[0006] The signal conversion device according to the present invention includes a speaker housed in a case, a drive circuit for driving the speaker based on a signal output from an electric guitar, and a drive circuit housed in the case, In response to fluctuations in the magnetic field generated from the voice coil of the speaker, which is vibrating under the influence of the diaphragm of the speaker, a signal corresponding to the signal output from the electric guitar is output. and a magnetic pickup disposed opposite the speaker, and a signal output from the electric guitar is converted into a signal from the magnetic pickup.

[0007] With this configuration, when the electric guitar is played, the speaker housed in the case is driven by the signal output from the electric guitar (the diaphragm vibrates in response to the vibration of the voice coil), and the speaker emits a performance sound corresponding to the vibration of the diaphragm.The magnetic pickup then outputs a signal corresponding to the signal output from the electric guitar in response to fluctuations in the magnetic field emitted from the voice coil, which vibrates under the influence of the speaker's diaphragm.

[0008] The signal conversion device according to the present invention may have a configuration including an output circuit that outputs a signal based on the signal from the magnetic pickup.

[0009] With this configuration, a signal based on the signal from the magnetic pickup and further corresponding to the characteristics of the output circuit can be obtained.

[0010] The signal conversion device according to the present invention may further include a position adjustment section that adjusts the relative position of the speaker and the magnetic pickup within the case.

[0011] With this configuration, it is possible to adjust the degree of influence of the speaker (voice coil) on the magnetic pickup, and therefore it is possible to adjust the characteristics of the signal from the magnetic pickup.

[0012] In the signal conversion device according to the present invention, the position adjustment section may include a pickup adjustment section that adjusts the position of the magnetic pickup.

[0013] Furthermore, the pickup adjustment unit may include a first adjustment unit that adjusts the position of the magnetic pickup in a direction intersecting the axis of the speaker, or may include a second adjustment unit that adjusts the position of the magnetic pickup in the direction of the axis of the speaker. [Effects of the Invention]

[0014] With the signal conversion device of the present invention, even if the playing sound emitted from the speaker inside the case is not loud, the signal from the electric guitar can be picked up by a magnetic pickup via the speaker and converted into a signal that is similar to the signal output from a microphone receiving the sound emitted from the speaker, without being affected by external noise. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a circuit diagram showing the circuit configuration of a signal conversion device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view showing an example of the appearance of the case. [Figure 3] FIG. 3 is a diagram showing an example of the configuration of a position adjustment unit that adjusts the relative position between the speaker and the magnetic pickup within the case. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0017] A signal conversion device according to an embodiment of the present invention has a circuit configuration as shown in FIG.

[0018] In FIG. 1, the signal conversion device includes a speaker 10, a drive circuit 11, a magnetic pickup 12, and an output circuit 13. The speaker 10, drive circuit 11, magnetic pickup 12, and output circuit 13 are housed in a predetermined box-shaped case 100 as shown in FIG. 2. The shape and size of the case 100 are not particularly limited, but it is preferably similar in shape and size to cases commonly used for electric guitar effectors. The speaker 10 and magnetic pickup 12 are positioned opposite each other within the case 100. The magnetic pickup 12 is the same type as that used in electric guitars, and may be a single-coil pickup or a hum-canceling pickup with noise cancellation functionality.

[0019] The drive circuit 11 and output circuit 13 are appropriately arranged within the case 100. The drive circuit 11 is electrically connected between the speaker 10 and an input terminal IN, to which a signal from the electric guitar 200 is input, and the output circuit 13 is electrically connected between the magnetic pickup 12 and the output terminal OUT. The drive circuit 11 has a preamplifier 111 that receives the signal from the input terminal IN and performs pre-amplification, and a power amplifier 112 connected to the preamplifier. The power amplifier 112 has a relatively low output characteristic of about 1 W. The signal from the electric guitar 200 that is input to the input terminal IN is amplified by the drive circuit 11 (preamplifier 111 and power amplifier 112) to a signal with predetermined characteristics and supplied to the speaker 10, which drives the speaker 10 (emits a performance sound).

[0020] The magnetic pickup 12 outputs a signal that changes in response to the vibration of the voice coil (diaphragm) of the speaker 10, i.e., a signal that corresponds to the sound played by the electric guitar 200 emitted from the speaker 10. The output circuit 13 is composed of, for example, a preamplifier, and outputs the signal from the magnetic pickup 12 from the output terminal OUT as a signal with predetermined output characteristics.

[0021] The speaker 10 and the magnetic pickup 12 are housed in a case 100, for example, in a state as shown in FIG.

[0022] 3, a first mounting base 21 is fixed at a predetermined position on the inner surface of a wall 101 of the case 100. The speaker 10 is fixed to the first mounting base 21 so that sound emitted from the speaker 10 travels toward a wall 102 (the wall on the opposite side) directly opposite the wall 101. A second mounting base 22 is fixed to the wall 102 of the case 100. A pickup adjustment unit 30 (position adjustment unit) is provided on the second mounting base 22 to adjust the relative position of the magnetic pickup 12 with respect to the speaker 10, and the magnetic pickup 12 is provided on the pickup adjustment unit 30.

[0023] The pickup adjustment unit 30 includes a first adjustment block 31 (first adjustment unit) that adjusts the position of the magnetic pickup 12 in a direction Dx that is perpendicular to (intersects with) the axis AL of the speaker 10, and a second adjustment block 32 (second adjustment unit) that adjusts the position of the magnetic pickup 12 in a direction Dy of the axis AL of the speaker 10. The first adjustment block 31 is provided on the second mounting base 22 so that its position in the direction Dx can be changed. The second adjustment block 32 is provided on the first adjustment block 31 so that its position in the direction Dy can be changed. The magnetic pickup 12 is fixed to the second adjustment block 32 so as to face the speaker 10.

[0024] In the signal conversion device described above, a signal from the electric guitar 200 being played, specifically a signal from the magnetic pickup of the electric guitar corresponding to the vibration of the strings of the electric guitar 200, is input to the input terminal IN. The signal input to the input terminal IN is amplified by the drive circuit 11 (preamplifier 111 and power amplifier 112) to a signal with predetermined characteristics and then supplied to the speaker 10. In this way, the speaker 10 is driven based on the signal from the electric guitar 200 input to the input terminal IN, and the speaker 10 emits a performance sound corresponding to the signal from the electric guitar 200.

[0025] In response to fluctuations in the magnetic field generated from the voice coil, which is vibrating under the influence of the diaphragm of speaker 10 that is emitting the sound produced by the performance, magnetic pickup 12 outputs a signal corresponding to the signal output from electric guitar 200. The signal output from magnetic pickup 12, which corresponds to the sound produced by speaker 10, is then passed through output circuit 13 as a signal with predetermined output characteristics and is output from output terminal OUT.

[0026] The signal output from the output terminal OUT is supplied to a recording device directly or via other signal processing devices such as an effector, mixer, etc. The output signal from the output terminal OUT can also be supplied to an external speaker via a guitar amplifier, and can be output from the external speaker as a loud performance sound.

[0027] With the signal conversion device described above, even if the performance sound emitted from the speaker 10 inside the case 100 is not loud, the signal from the electric guitar 200 can be picked up by the magnetic pickup 12 via the speaker 10 (vibration of the voice coil) and converted into a signal that is similar to the signal output from a microphone receiving sound emitted from a speaker, without being affected by external noise.

[0028] This signal conversion device can also be used as an effects unit itself, reproducing the airy, three-dimensional sound that can be heard when playing back a sound source (such as a record), rather than the flat sound of digital audio.

[0029] Furthermore, this signal conversion device has a pickup adjustment section 30 (first adjustment block 31, second adjustment block 32) that adjusts the relative position of the magnetic pickup 12, which is disposed opposite the speaker 10, with respect to the speaker 10, making it possible to change the relative positions of the opposing speaker 10 and magnetic pickup 12. This makes it possible to adjust the degree of influence of the speaker 10 (voice coil) on the magnetic pickup 12, and therefore to adjust the characteristics of the signal from the magnetic pickup 12, i.e., the characteristics of the signal output from the output terminal OUT.

[0030] Although the pickup adjustment unit 30 includes both the first adjustment block 31 (first adjustment unit) that adjusts the position of the magnetic pickup 12 in the direction Dx that is perpendicular to (intersects with) the axis AL of the speaker 10, and the second adjustment block 32 (second adjustment unit) that adjusts the position of the magnetic pickup 12 in the direction Dy of the axis AL of the speaker 10, it may include only one of them. Also, the first adjustment block 31 (first adjustment unit) may adjust the position of the magnetic pickup 12 not only in the direction Dx that is perpendicular to the axis AL of the speaker 10, but also in a direction that intersects with the axis AL at any angle.

[0031] Furthermore, the relative positions of the speaker 10 and the magnetic pickup 12 may be adjusted by adjusting the position of the speaker 10 instead of adjusting the position of the magnetic pickup 12 .

[0032] Furthermore, in the above-described signal conversion device, the speaker 10, the drive circuit 11, the magnetic pickup 12, and the output circuit 13 are housed in the case 100, but this is not limiting, and it is sufficient if at least the speaker 10 and the magnetic pickup 12, which are arranged opposite each other, are housed in the case 10.

[0033] 1, and may be configured such that a power amplifier 112 is connected to the input terminal IN without including the preamplifier 111. Furthermore, the specific configuration of the output circuit 13 is not limited to that shown in Fig. 1, and may be configured such that the signal from the magnetic pickup 12 is output directly from the output terminal OUT without providing the output circuit 13.

[0034] Although the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments described above can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments are included within the scope and spirit of the invention, and are also included in the invention described in the claims. [Industrial Applicability]

[0035] The signal conversion device of the present invention has the effect of being able to convert a signal from an electric guitar into a signal that sounds like a signal output from a microphone receiving sound emitted from a speaker, without emitting a loud volume or being affected by external noise, and is useful as a signal conversion device for converting signals output from an electric guitar. [Explanation of symbols]

[0036] 10 Speakers 11 Drive circuit 111 Preamp 112 Power Amplifier 12 Magnetic Pickup 13 Output circuit 21 First mounting base 22 Second mounting base 30 Pickup adjustment section 31 First Adjustment Block 32 Second Adjustment Block

Claims

1. a speaker housed in the case; a driving circuit that drives the speaker based on a signal output from the electric guitar; a magnetic pickup housed in the case and disposed opposite the speaker so as to output a signal corresponding to a signal output from the electric guitar in response to a change in a magnetic field generated from a voice coil of the speaker that is vibrating under the influence of the speaker's diaphragm; a signal conversion device that converts the signal output from the electric guitar into a signal from the magnetic pickup;

2. 2. The signal conversion device according to claim 1, further comprising an output circuit for outputting a signal based on the signal from said magnetic pickup.

3. 2. The signal conversion device according to claim 1, further comprising a position adjustment section for adjusting the relative position of said speaker and said magnetic pickup within said case.

4. 4. The signal conversion device according to claim 3, wherein the position adjustment section includes a pickup adjustment section that adjusts the position of the magnetic pickup.

5. 5. The signal conversion device according to claim 4, wherein the pickup adjustment section includes a first adjustment section that adjusts the position of the magnetic pickup in a direction intersecting an axis of the speaker.

6. 5. The signal conversion device according to claim 4, wherein the pickup adjustment section includes a second adjustment section that adjusts the position of the magnetic pickup in the axial direction of the speaker.

Images