US3291888A - Electric guitar - Google Patents

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US3291888A
US3291888A US365007A US36500764A US3291888A US 3291888 A US3291888 A US 3291888A US 365007 A US365007 A US 365007A US 36500764 A US36500764 A US 36500764A US 3291888 A US3291888 A US 3291888A
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guitar
microphones
tone signals
housing
microphone
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Meazzi Remo
Caldironi Franco
Olivieri Attilio
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H3/00—Instruments in which the tones are generated by electromechanical means
    • G10H3/12—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument
    • G10H3/14—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means
    • G10H3/18—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means using a string, e.g. electric guitar
    • G10H3/182—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means using a string, e.g. electric guitar using two or more pick-up means for each string
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/02—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
    • G10H1/06—Circuits for establishing the harmonic content of tones, or other arrangements for changing the tone colour
    • G10H1/14—Circuits for establishing the harmonic content of tones, or other arrangements for changing the tone colour during execution

Definitions

  • This invention concerns an improved electric guitar, of the type normally used by dance orchestras.
  • These magnetic microphones are suitable for transmitting the electric pulses, into which the vibrations have been transformed, to an external amplifier which transforms them back into sounds.
  • the first of said microphones reproduces the deep sounds, as the strings vibrations are wider, owing to the peculiar position occupied by the said microphone.
  • the second one reproduces the higher sounds, owing to less wide strings vibrations, which are nearer the holding point.
  • the main scope of this invention is the realization of an improvement, as embodied into the apparatus of said type, and such as to eliminate the above referred to difliculties.
  • the guitars being the object of this invention, actually allow to obtain, at the feeding end into the amplifier of known type, to which the instrument is externally linked, only perfectly levelled signals, of great strength.
  • Said improvement besides offering the possibility of keeping the sounds reproduction apparatus at a lower volume, with great benefits as regarding the quality of its reproduction, allows its well the grounds and background noises elimination and permits the insertion into the circuit of components such as capacitors and resistors, suitable for predetermining such timbres as otherwise are absolutely unobtainable.
  • This improvement provides also for the realization of means, to be used in electric guitars, suitable for allowing the automatic breaking of the electric circuits connected to them, when said instruments are disposed in their rest position.
  • the improved instruments referred to show also the feature of being equipped with dissolves and volumes controls, suitably responding to a lever device, partially rotatable around a stationary pin, along a path which may be suitably limited by mobile stops.
  • Said controls actually, may be displaced more easily, along a fixed path, by the action of the players hand.
  • FIG. 1 there is shown an electric guitar, as seen from the top;
  • FIG. 2 there is shown an electronic circuit, as applied to the improved guitar under reference; it is characterized in that, before the amplifier circuit, there is provided a potentiometer, having the capacity of obtaining a lap dissolve of the electric pulses, as transmitted by two suitable microphones.
  • the improved electric guitar under reference is characterized in that it comprises two microphones 12 and 13; these are preferably placed in correspondence of two surface parts of said instrument, near the place where the strings lay.
  • microphone 13 is disposed in correspondence of a position near where the little bridge 15 is located.
  • a microphone 12 is preferably applied upon the frontal surface of the guitar, in correspondence with the handles ends position 14 of said instrument; the microphone 13 shall preferably be applied in correspondence with a position near the bridge 15.
  • the efiiciency of the detector will amount to many times that of microphone 13' such a phenomenon is due to the fact that the vibrations of strings, above the microphone 12, are much wider as compared to those taking place in correspondence of a nearby position, inrelation to the position where the microphone 13 has been applied.
  • the player in the case of conventional electric guitars, in order to be able to obtain levelled sounds, is forced to use the volumes control of the amplifier, so provoking a consequent augmentation of ground noise.
  • Such a contrivance besides, does not allow the perfect mixing of the two microphones, as one is confronted by two signals of different intensity.
  • microphones 12 and 13 are suitably banked to a potentiometer 21, which allows for the mixing of signals or pulses, coming from said microphones, by suitably controlling the intensity of the same ones.
  • This control is made possible, by actuating a lever 19, capable of rotating around a pin 36, this last being suitable contained within the body of this improved guitar.
  • Said lever 19 comprises an end part, which protrudes outside the guitar and is partially covered by a metallic plate 16; this last is slightly above the upper surface 10 of the guitar under reference.
  • the lever 19 is capable of jutting out, in correspondence with its end part, from said slit, in such a way as to be very easily displaced by the player.
  • Said lever 19 may be suitably coupled to a scale 20,
  • slits 38 and 39 in which there are inserted self locking means, preferably of the wing nut type; these may be suitably moved, within fixed limits, along the said slits 38 and 39.
  • the two stops 34 and 35 have function of allowing a limitation in the rotation of lever 19, when the peculiar nature of the music, which is being reproduced, may call for a suitable limitation in the use, within certain limits,. of said dissolves control 21.
  • This lever 19, applied to the dissolves control 21,. allows an easier control for such element, as compared with the handles, of the type shown in 24 and 25.
  • Said handles in the specific instance of the improved guitar under reference, have the function of regulating the tone for the sounds emitted by the instrument and are, accordingly, applied to the controls schematically shown in FIG. 2 and marked 26 and 27.
  • the improved guitar under reference is also charactrized in that it comprises a second metallic plate 17, to which is applied the actuating lever 22 of the volumes control 18.
  • Said actuating device is of a similar type to the one shown with 19 and is preferably coupled to a scale 23. It may be pointed out that this improved guitar is preferably transistorized and fed by electric batteries 30.
  • FIG. 2 of the enclosed drawing there are'shown two transistors 28 and 29, being parts of the amplifiers circuit, applied to the guitar under reference.
  • a mercury bulb which acts as an automatic switch for the electronic circuit amplifying the sounds. More specifically, said mercury bulb has the function of automatically opening and closing the feed circuit of the batteries, whenever the guitar is respectively put in its rest or use position.
  • This bulb in other words, permits the passage of electric current only when the mercury, owing to a suitable inclination of the bulb itself, may arrive at a prefixed level.
  • Naturally said bulb 33 is applied in such a position as to close the circuit when the guitar is placed in a position corresponding to its use; the element 33 acts as a switch, when the guitar is inclined otherwise.
  • a guitar housing having an opening; a plurality of guitar strings mounted on said guitar housing extending above said opening; at least two microphones mounted on said guitar. housing and located in the region of and spaced from' each other in direction of said guitar strings so as to receive tones of different types; operable electrical mixing means arranged within said guitar housing and connected to said microphones for mixing the tone signals transmitted by the same and adjusting the amplitudes of said tone signals relative to each other in such a manner that upon operation of said electrical mixing means the amplitude of the tone signals of one microphone is in creased while the amplitude of the tone signals of the other microphone is decreased, and vice-versa; a plurality of adjusting means each associated with one of said microphones for individually adjusting the tone signals transmitted by the respective microphone; and pre-amplifier means arranged also in said guitar housing and connected to said electrical mixing means for amplifying the mixed electrical signals derived therefromyand connector means on said housing connected to said pre-amplifier means and adapted to be connected to a
  • said electrical mixing means includes mechanical means ma-nually operable for adjusting said mixing means.
  • said electrical mixing means comprises a potentiometer having a resistance element and a sliding contact movable along said resistance element and connected to ground potential, said microphone being connected to said resistance element, and said mechanical adjusting means being linked to said sliding contact.
  • said mechanical adjusting means comprises a lever mechanically connected to said sliding contact and electrically isolated therefrom, said lever projecting out of said guitar; an indicating scale associated with said lever and mounted on said guitar for indicating the position of said lever; and adjustable stopping means located at each end of said scale for limiting the motion of said lever.
  • said adjusting means for individually adjusting the tone signals transmitted from said microphones includes means for suppressing noise signals associated with said tone signals.
  • An electric guitar according to claim 1 including a portable energy source mounted within said guitar for energizing said pre-amplifier.
  • An electric guitar according to claim 6 including a mercury switch connecting said energy source to said preamplifier when said guitar is in one position, and disconnecting said energy source from said pre-amplifier when said guitar is in another position.

Description

R. MEAZZI ETAL 3,291,888
ELECTRIC GUITAR Dec. 13, 1966 Filed May 5, 1964 (Ir-VT I 4 N 44 I I W INVENTORS R emu Maui; 9901700 C'Qfdiron/ Ii /A 0 afzm United States Patent 3,291,888 ELECTRIC GUITAR Remo Meazzi, 6 Via Piatti, Franco Caldironi, 24 Via Bolzano, and Attilio Olivieri, 32 Via Trebbia, all of Milan, Italy Filed May 5, 1964, Ser. No. 365,007 Claims priority, application Italy, May 7, 1963,
7 Claims. (Cl. 841.16)
This invention concerns an improved electric guitar, of the type normally used by dance orchestras.
It is know that electric guitars, of conventional type, are equipped with one or more magnetic microphones, preferably placed under the strings, respectively, in correspondence with the handles end and near the bridge holding the said ones.
These magnetic microphones are suitable for transmitting the electric pulses, into which the vibrations have been transformed, to an external amplifier which transforms them back into sounds.
The first of said microphones reproduces the deep sounds, as the strings vibrations are wider, owing to the peculiar position occupied by the said microphone.
The second one, on the contrary, reproduces the higher sounds, owing to less wide strings vibrations, which are nearer the holding point.
As both microphones are banked, through a single channel, to the amplifier, there follows an unbalance between the two frequencies, compelling the operator to touch up continuously the amplifiers volume control.
For these reasons, known electric guitars, actually built, produce sounds which are subjected to disturbances, ground and background noises, while it is impossible to obtain a rational and homogeneic levelling of both frequencies.
Consequently, the sounds quality is impaired and its volume is not stable, owing to blending or partial mixing of said bands for said frequencies.
The main scope of this invention is the realization of an improvement, as embodied into the apparatus of said type, and such as to eliminate the above referred to difliculties.
The guitars, being the object of this invention, actually allow to obtain, at the feeding end into the amplifier of known type, to which the instrument is externally linked, only perfectly levelled signals, of great strength.
Said improvement, besides offering the possibility of keeping the sounds reproduction apparatus at a lower volume, with great benefits as regarding the quality of its reproduction, allows its well the grounds and background noises elimination and permits the insertion into the circuit of components such as capacitors and resistors, suitable for predetermining such timbres as otherwise are absolutely unobtainable.
This improvement provides also for the realization of means, to be used in electric guitars, suitable for allowing the automatic breaking of the electric circuits connected to them, when said instruments are disposed in their rest position.
The improved instruments referred to, show also the feature of being equipped with dissolves and volumes controls, suitably responding to a lever device, partially rotatable around a stationary pin, along a path which may be suitably limited by mobile stops.
These dissolves and volumes controls, owing to their functional features, show a strong advantage as compared to the similar controls, now used for electric guitars.
Said controls, actually, may be displaced more easily, along a fixed path, by the action of the players hand.
This last accordingly, thanks to the peculiar shaping of 3,291,888 Patented Dec. 13, 1966 the levers actuating the dissolves and volumes controls, as applied to the electric guitars under reference, may play and at the same time actuate said controlling elements. These and other features of these improved guitars may be better understood with the help of the various figures in the enclosed drawing, in which:
In FIG. 1 there is shown an electric guitar, as seen from the top;
In FIG. 2 there is shown an electronic circuit, as applied to the improved guitar under reference; it is characterized in that, before the amplifier circuit, there is provided a potentiometer, having the capacity of obtaining a lap dissolve of the electric pulses, as transmitted by two suitable microphones.
With particular reference to the numerical symbols of the enclosed drawing, the improved electric guitar under reference is characterized in that it comprises two microphones 12 and 13; these are preferably placed in correspondence of two surface parts of said instrument, near the place where the strings lay.
Particularly, microphone 13 is disposed in correspondence of a position near where the little bridge 15 is located. As clearly shown by examining FIG. 1 of the enclosed drawing, a microphone 12 is preferably applied upon the frontal surface of the guitar, in correspondence with the handles ends position 14 of said instrument; the microphone 13 shall preferably be applied in correspondence with a position near the bridge 15.
Owing to this peculiar disposition of microphones 12 and 13, the first one is reproducing the low sounds, while the microphone 13 will take the higher ones.
Such a diversity of timbres is due to the fact that the strings vibrations, in the position where the microphones have been disposed, are of different width.
Whenever the microphone 12 is inserted into the amplifier, it will be easily remarked that the efiiciency of the detector will amount to many times that of microphone 13' such a phenomenon is due to the fact that the vibrations of strings, above the microphone 12, are much wider as compared to those taking place in correspondence of a nearby position, inrelation to the position where the microphone 13 has been applied.
No one has ever thought how to find a remedy to this heavy difficulty.
The player, in the case of conventional electric guitars, in order to be able to obtain levelled sounds, is forced to use the volumes control of the amplifier, so provoking a consequent augmentation of ground noise.
Such a contrivance, besides, does not allow the perfect mixing of the two microphones, as one is confronted by two signals of different intensity.
For the specific instance of this invention, microphones 12 and 13 are suitably banked to a potentiometer 21, which allows for the mixing of signals or pulses, coming from said microphones, by suitably controlling the intensity of the same ones.
This control is made possible, by actuating a lever 19, capable of rotating around a pin 36, this last being suitable contained within the body of this improved guitar.
Said lever 19 comprises an end part, which protrudes outside the guitar and is partially covered by a metallic plate 16; this last is slightly above the upper surface 10 of the guitar under reference.
Owing to this peculiar disposition of said plates 16, as
' related to the upper surface 10 of the guitar, the lever 19 is capable of jutting out, in correspondence with its end part, from said slit, in such a way as to be very easily displaced by the player.
This type of manual control, as applied to the dissolves control or potentiometer 21, is in itself a part of this invention.
Said lever 19 may be suitably coupled to a scale 20,
while in the body of plate 16 there may be made some slits 38 and 39, in which there are inserted self locking means, preferably of the wing nut type; these may be suitably moved, within fixed limits, along the said slits 38 and 39.
The two stops 34 and 35 have function of allowing a limitation in the rotation of lever 19, when the peculiar nature of the music, which is being reproduced, may call for a suitable limitation in the use, within certain limits,. of said dissolves control 21.
This lever 19, applied to the dissolves control 21,. allows an easier control for such element, as compared with the handles, of the type shown in 24 and 25.
Said handles, in the specific instance of the improved guitar under reference, have the function of regulating the tone for the sounds emitted by the instrument and are, accordingly, applied to the controls schematically shown in FIG. 2 and marked 26 and 27.
The improved guitar under reference is also charactrized in that it comprises a second metallic plate 17, to which is applied the actuating lever 22 of the volumes control 18.
Said actuating device is of a similar type to the one shown with 19 and is preferably coupled to a scale 23. It may be pointed out that this improved guitar is preferably transistorized and fed by electric batteries 30.
In FIG. 2 of the enclosed drawing there are'shown two transistors 28 and 29, being parts of the amplifiers circuit, applied to the guitar under reference. With 33 is marked a mercury bulb, which acts as an automatic switch for the electronic circuit amplifying the sounds. More specifically, said mercury bulb has the function of automatically opening and closing the feed circuit of the batteries, whenever the guitar is respectively put in its rest or use position.
This bulb, in other words, permits the passage of electric current only when the mercury, owing to a suitable inclination of the bulb itself, may arrive at a prefixed level.
Such a contrivance allows the player to part with the trouble of breaking the circuit whenever he ceases the use of his instrument.
Naturally said bulb 33 is applied in such a position as to close the circuit when the guitar is placed in a position corresponding to its use; the element 33 acts as a switch, when the guitar is inclined otherwise.
It is good to remark that the actuation of the lever 19 allows the use of the lap dissolve for the sounds and consequently for the electric pulses respectively received and transmitted by the microphone 12 and 13.
Owing to the peculiar features of the dissolves control under reference, it is possible to level suitably the sounds received by the two microphones 12 and 13, by actuating one lever only; said one may influence and modify, gradually and contemporaneously, the intensity of signals received by said microphones 12 and 13.
It is claimed:
1. In an electric guitar, in combination, a guitar housing having an opening; a plurality of guitar strings mounted on said guitar housing extending above said opening; at least two microphones mounted on said guitar. housing and located in the region of and spaced from' each other in direction of said guitar strings so as to receive tones of different types; operable electrical mixing means arranged within said guitar housing and connected to said microphones for mixing the tone signals transmitted by the same and adjusting the amplitudes of said tone signals relative to each other in such a manner that upon operation of said electrical mixing means the amplitude of the tone signals of one microphone is in creased while the amplitude of the tone signals of the other microphone is decreased, and vice-versa; a plurality of adjusting means each associated with one of said microphones for individually adjusting the tone signals transmitted by the respective microphone; and pre-amplifier means arranged also in said guitar housing and connected to said electrical mixing means for amplifying the mixed electrical signals derived therefromyand connector means on said housing connected to said pre-amplifier means and adapted to be connected to a conductor for transmittin g the pre-amplified mixed tone signals.
2. An electric guitar according to claim 1 wherein said electrical mixing means includes mechanical means ma-nually operable for adjusting said mixing means.
3. An electric guitar according to claim 2 wherein said electrical mixing means comprises a potentiometer having a resistance element and a sliding contact movable along said resistance element and connected to ground potential, said microphone being connected to said resistance element, and said mechanical adjusting means being linked to said sliding contact.
4. An electric guitar according to claim 3 wherein said mechanical adjusting means comprises a lever mechanically connected to said sliding contact and electrically isolated therefrom, said lever projecting out of said guitar; an indicating scale associated with said lever and mounted on said guitar for indicating the position of said lever; and adjustable stopping means located at each end of said scale for limiting the motion of said lever.
5. An electric guitar according to claim 1 wherein said adjusting means for individually adjusting the tone signals transmitted from said microphones includes means for suppressing noise signals associated with said tone signals.
6. An electric guitar according to claim 1 including a portable energy source mounted within said guitar for energizing said pre-amplifier.
7. An electric guitar according to claim 6 including a mercury switch connecting said energy source to said preamplifier when said guitar is in one position, and disconnecting said energy source from said pre-amplifier when said guitar is in another position.
ARTHUR GAUSS, Primary Examiner.
I. BUSCH, Assistant Examiner.

Claims (1)

1. AN ELECTRIC GUITAR, IN COMBINATION, A GUITAR HOUSING HAVING AN OPENING; A PLURALITY OF GUITAR STRINGS MOUNTED ON SAID GUITAR HOUSING EXTENDING ABOVE SAID OPENING; AT LEAST TWO MICROPHONES MOUNTED ON SAID GUITAR HOUSING AND LOCATED IN THE REGION OF AND SPACED FROM EACH OTHER IN DIRECTION OF SAID GUITAR STRINGS SO AS TO RECEIVE TONES OF DIFFERENT TYPES; OPERABLE ELECTRICAL MIXING MEANS ARRANGED WITHIN SAID GUITAR HOUSING AND CONNECTED TO SAID MICROPHONES FOR MIXING THE TONE SIGNALS TRANSMITTED BY THE SAME AND ADJUSTING THE AMPLITUDES OF SAID TONE SIGNALS RELATIVE TO EACH OTHER IN SUCH A MANNER THAT UPON OPERATION OF SAID ELECTRICAL MIXING MEANS THE AMPLITUDE OF THE TONE SIGNALS OF ONE MICROPHONE IS INCREASED WHILE THE AMPLITUDE OF THE TONE SIGNALS OF THE OTHER MICROPHONE IS DECREASED, AND VICE-VERSA; A PLURALITY OF ADJUSTING MEANS EACH ASSOCIATED WITH ONE OF SAID MICROPHONES FOR INDIVIDUALLY ADJUSTING THE TONE SIGNALS TRANSMITTED BY THE RESPECTIVE MICROPHONE; AND PRE-AMPLIFIER MEANS ARRANGED ALSO IN SAID GUITAR HOUSING AND CONNECTED TO SAID ELECTRICAL MIXING MEANS FOR AMPLIFYING THE MIXED ELECTRICAL SIGNALS DERIVED THEREFROM; AND CONNECTOR MEANS ON SAID HOUSING CONNECTED TO SAID PRE-AMPLIFIER MEANS AND ADAPTED TO BE CONNECTED TO A CONDUCTOR FOR TRANSMITTING THE PRE-AMPLIFIED MIXED TONE SIGNALS.
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3472943A (en) * 1965-10-15 1969-10-14 Nippon Musical Instruments Mfg Pickup and circuit for stringed musical instrument
US3742113A (en) * 1971-04-28 1973-06-26 M Cohen Stringed musical instrument with electrical feedback
US4149442A (en) * 1977-06-13 1979-04-17 Boshco Nikolas K Metal surfaced electric guitar
FR2474734A1 (en) * 1980-01-28 1981-07-31 Fender Clarence SENSOR FOR ELECTRIC MUSICAL INSTRUMENT OF THE TYPE A CORDES
US5932827A (en) * 1995-01-09 1999-08-03 Osborne; Gary T. Sustainer for a musical instrument
US7304232B1 (en) * 2006-02-11 2007-12-04 Postell Mood Nicholes Joystick gain control for dual independent audio signals
USD740352S1 (en) * 2013-05-02 2015-10-06 Robert Crelin Guitar body
US9812029B1 (en) * 2016-10-12 2017-11-07 Brianna Henry Evaluating a position of a musical instrument

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9018509B2 (en) 2012-09-11 2015-04-28 Jeff BIALKOWSKI Stringed musical instrument with an auxiliary pickup

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2746333A (en) * 1950-12-21 1956-05-22 Penewell John Hawahan guitar volume control arm

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2746333A (en) * 1950-12-21 1956-05-22 Penewell John Hawahan guitar volume control arm

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3472943A (en) * 1965-10-15 1969-10-14 Nippon Musical Instruments Mfg Pickup and circuit for stringed musical instrument
US3742113A (en) * 1971-04-28 1973-06-26 M Cohen Stringed musical instrument with electrical feedback
US4149442A (en) * 1977-06-13 1979-04-17 Boshco Nikolas K Metal surfaced electric guitar
FR2474734A1 (en) * 1980-01-28 1981-07-31 Fender Clarence SENSOR FOR ELECTRIC MUSICAL INSTRUMENT OF THE TYPE A CORDES
US5932827A (en) * 1995-01-09 1999-08-03 Osborne; Gary T. Sustainer for a musical instrument
US7304232B1 (en) * 2006-02-11 2007-12-04 Postell Mood Nicholes Joystick gain control for dual independent audio signals
USD740352S1 (en) * 2013-05-02 2015-10-06 Robert Crelin Guitar body
USD780833S1 (en) 2013-05-02 2017-03-07 Robert Crelin Guitar body
US9812029B1 (en) * 2016-10-12 2017-11-07 Brianna Henry Evaluating a position of a musical instrument

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