Constantly changing polyphonic pitch controller

• US 4,794,838 A
• Filed: 07/17/1986
• Issued: 01/03/1989
• Est. Priority Date: 07/17/1986
• Status: Expired due to Term

• Current Assignee: James F. Iii Corrigau
• Original Assignee: James F. Iii Corrigau
• Inventors: Corrigau, James F. III
• Primary Examiner(s): Witkowski, Stanley J.
• Application Number:
  US06/886,554
• Time in Patent Office: 901 Days
• Field of Search: 84/1.01, 84/1.04-1.27, 84/DIG. 30, 84/478, 362/86, 340/712, 340/815.1, 340/815.11, 340/815.15-815.23, 338/69
• US Class Current: 84/600
• CPC Class Codes: G10H 1/24 for selecting plural preset register stops
• CPC Class Codes: G10H 1/342 for guitar-like instruments with or without strings and with a neck on which switches or string-fret contacts are used to detect the notes being played electric guitars in which the tones are generated by the vibration of strings G10H3/18
• CPC Class Codes: G10H 2220/301 Fret-like switch array arrangements for guitar necks
• CPC Class Codes: G10H 2230/145 Spint guitar keyboard, i.e. mimicking a combination of a guitar-like instrument, with or without strings, and a piano-like keyboard, e.g. with white and black keys arranged like on a piano
• CPC Class Codes: Y10S 84/30 Fret control

Abstract

A real-time polyphonic pitch controller and process for controlling notes or tones emanating from signal synthesizers such as used in the performance of music. The controller comprises a body with key controllers, each of which activates a pre-programmed note; a strumming controller which automatically activates selected key controlled notes in a pre-programmed sequence and rate; and controls and displays used for programming and performance. Extending longitudinally from the body is a guitar-like neck graduated by fret markings and over which slides a hand controller incorporating finger levers. Sliding the hand controller creates portamento, vibrato or glissando effects on the notes activated by the key controllers. Also, each finger lever of the hand controller when depressed raises and/or lowers its own peculiar, pre-programmed combination of individually voiced notes by pre-programmed amounts. Some note pitches may be raised, others lowered, and still others unaffected by the movement of a lever, and the finger levers may be operated separately or in combination. When only partially depressed, a lever alters the pitch of the pre-selected combination of individually voiced notes fractionally, in porportion to the lever'"'"'s depression. The controllers may further operate in conjunction with a computer program which interprets and processes the controller'"'"'s pitch altering signals and teaches the musician how to perform on the instrument expressively. In an alternative embodiment, the controller incorporates a sliding fretted hand controller with finger pads rather than levers.

Claims

1. A device for controlling electrical signals comprising:

(a) a body comprising a multiplicity of controls and displays for respectively programming and monitoring the operation of the device, and a multiplicity of on/off switches for activating pre-programmed electrical signals generated by an external electrical signal generating means, the switches being disposed on a base portion of said body, said body having two orthogonal axes with distal and proximate borders on one axis, and upper and lower borders on the other axis;

(b) a rigid neck with a proximate end attached to and extending longitudinally from the distal border of the body;

(c) a slide hand controller member comprising a support for a plurality of levers which may be actuated by one hand of a user, said slide hand controller member being superposed on so as to freely slide longitudinally along the neck, said slide hand controller member also producing first and second distinctive electrical control signals as it slides longitudinally and as its individual levers are actuated, respectively, said first and second distinctive electrical control signals electrically altering the pre-programmed electrical signals activated by the multiplicity of switches attached to the body;

(d) stopping means secured to the distal end of the neck for inhibiting further longitudinal motion of the slide hand controller member in the distal direction; and

(e) processing means, responsive to said multiplicity of on/off switches of the body and said first and second distinctive electrical control signals, for determining controller position, lever position and movement signals representing the position of said slide hand controller member along said neck, the position of said levers, and movement of said slide hand controller member along said neck, respectively, and for translating according to an intelligent protocol, the controller position, lever position and movement signals into adapted electrical control signals for controlling at least one of pitch, amplitude and tone of the output of said external signal generating means, said processing means being controlled by user input via the multiplicity of controls of the body.

2. A device as set forth in claim 1, further comprising a display and a ROM with setup charts and algorithms stored therein which are displayed on said display along with the adapted electrical control signals translated by the processing means, said display enabling the user to monitor said adapted electrical control signals and to receive instructions for using the device, said ROM communicating with and providing further control input for use in programming the operation of said processing means.

3. A device as set forth in claim 2, wherein the multiplicity of on/off switches disposed on the body and used for activating said pre-programmed electrical signals are in the shape of white keys of a piano keyboard, said keys running longitudinally and parallel to the upper and lower borders of the body so as to provide easy finger actuation by the user, said switches also comprising velocity and pressure transducer means for controlling the amplitude and tone of the pre-programmed electrical signals.

4. A device as set forth in claim 2, wherein the multiplicity of on/off switches disposed on the body and used for activating said pre-programmed electrical signals are in the shape of white keys of a piano keyboard, said keys being wider at one end than the other end and adjacent to each other so as to extend radially towards the lower border of the body to form a semi-circular pattern conforming to the positioning of the user'"'"'s natural hand span relative to said keys.

5. A device as set forth in claim 2, wherein the body further comprises:

a strum controller comprising a first monostable on/off strum switch, normally undepressed, that may be depressed by the user'"'"'s little finger, wherein said first strum switch is fixed on an upper proximate quadrant of the body adjacent to a proximate section of the multiplicity of switches disposed on the body for activating said pre-programmed electrical signals, and a second monostable on/off strum switch, normally undepressed, that may be depressed by the user'"'"'s thumb, wherein said second strum switch is fixed on an upper distal quadrant of the body adjacent to a distal section of the multiplicity of switches disposed on the body for activating said pre-programmed electrical signals, wherein said first and second strum switches, when depressed, independently activate at a pre-programmed rate and sequence the pre-programmed electrical signals.

6. A device as set forth in claim 5, wherein the first and second strum switches of the strum controller are joined by an arm that has ends superposed on and fixed to each strum switch and is rested on a pivot secured to the body between the first and second strum switches.

7. A device as set forth in claim 5, wherein the first and second strum switches of the strum controller each contain pressure and velocity sensors which provide inputs to said processing means, wherein said first and second strum switches are joined by an arm that has ends superposed on and fixed to each strum switch and is rested on a pivot secured to the body, said pivot being movable such that it may be moved to any position between the first and second strum switches, thereby creating a fulcrum for the arm during the operation of the strum controller.

8. A device as set forth in claim 2, wherein the slide hand controller member communicates electronically with said processing means by way of a wireless electromagnetic transmitter and receiver.

9. A device as set forth in claim 8, wherein the slide hand controller member comprises a digital transmission system powered by a battery which is automatically recharged whenever the slide hand controller member touches the stopping means.

10. A device as set forth in claim 2, wherein the neck is indented at regular intervals with tapered notches and the interior side of the slide hand controller member contains anti-frictional compressed rollers which extend as each roller passes over one of said notches so as to indicate, tacilely, the position of the slide hand controller member on the neck.

11. A device as set forth in claim 2, wherein the neck is marked with fret lines spaced exponentially for indicating the position of the slide hand controller member along said neck.

12. A device as set forth in claim 2, wherein the neck is marked with fret lines spaced linearly for indicating the position of the slide hand controller member along said neck.

13. A device as set forth in claim 2, further comprising cables which electrically connect the processing means and the slide hand controller member, said neck being hollow so as to form a cavity for holding said cables.

14. A device as set forth in claim 2, wherein the exterior side of said slide hand controller member contains a thumb lever and four finger levers which are positioned in conformity with the natural grasp of the user'"'"'s hand and which are normally held in an extended position by a spring when the corresponding lever is not depressed, a moment being created by the depression of one of said levers and the depression of each of said levers producing said lever position signals in proportion to the amount of depression of each lever.

15. A device as set forth in claim 2, wherein the slide hand controller member further comprises a key column, the neck further comprising a two-walled track into which the key column protrudes so as to restrain the slide hand controller member from rotating about the neck'"'"'s longitudinal axis.

16. A device as set forth in claim 15, wherein each wall of the neck'"'"'s track comprises resistive strips which the slide hand controller member electrically shunts by means of the key column, thereby creating a variable resistance circuit with a resistive value dependent upon the slide hand controller'"'"'s longitudinal position along the neck.

17. A device as set forth in claim 2, wherein the multiplicity of on/off switches disposed on the body are a plurality of parallel guitar-like strings which are strummed or picked to individually activate said pre-programmed electrical signals, said strings running longitudinally along the body and having amplitude sensing transducers which activate the pre-programmed electrical signals.

18. A process for producing polyphonic pitch altering control signals in real-time, comprising the following steps:

(a) assigning basic note pitch values to a plurality of key controller on/off switches controlled by one hand of a user;

(b) assigning a first predetermined incremental note pitch value to a predetermined increment of movement of a slide hand controller member such that said basic note pitch values are polyphonically altered uniformly in one of a glissando and portamento manner as said slide hand controller member is slid;

(c) assigning second predetermined incremental note pitch values to levers attached to the exterior side of the slide hand controller member, said levers being activated by the fingers and thumb of one hand of the user and altering, in proportion to their depression, the pitch of the basic note pitch values of the plurality of key controller on/off switches;

(d) depressing in a desired sequence the plurality of key controller switches so as to produce a signal corresponding to said basic note pitch values;

(e) selectively sliding said slide hand controller member so as to produce a signal corresponding to said first predetermined incremental note pitch value;

(f) selectively depressing said levers so as to produce a signal corresponding to said second predetermined incremental note pitch values;

(g) processing said signal corresponding to said basic note pitch values and said signals corresponding to said first and second predetermined incremental note pitch values to produce a polyphonic pitch control signal; and

(h) controlling a sound synthesizeer to vary its output in response to said polyphonic pitch control signal.

19. A process as set forth in claim 18, comprising the further steps of:

(i) displaying the polyphonic pitch control signal on a display; and

(j) displaying user instructions on said display for purposes of teaching and instructing the user as to how to produce said polyphonic pitch control signals.

20. A process for producing polyphonic pitch altering control signals in real-time, comprising the following steps:

(a) assigning basic note pitch values to a plurality of key controller on/off switches controlled by one hand of a user;

(b) determining a sequence and rate at which said plurality of key controller on/off switches are to be activated by a strum controller;

(c) assigning a first predetermined incremental note pitch value to a predetermined increment of movement of a slide hand controller member such that basic note pitch values are polyphonically altered uniformly in one of a glissando and portamento manner as said slide hand controller member is slid;

(d) assigning second predetermined incremental note pitch values to levers attached to the exterior side of the slide hand controller member, said levers being activated by the fingers and thumb of one hand of the user and altering, in proportion to their depression, the pitch of the basic note pitch values of the plurality of key controller on/off switches;

(e) depressing in a desired sequence said plurality of key controller on/off switches so as to produce a signal corresponding to said basic note pitch values and selectively activating said strum controller in said sequence at said rate to thereby produce signals corresponding to said sequence of basic note pitch values;

(f) selectively sliding said slide hand controller member so as to produce a signal corresponding to said first predetermined incremental note pitch value;

(g) selectively depressing said levers so as to produce a signal corresponding to said second predetermined incremental note pitch values;

(h) processing said signal corresponding to said basic note pitch values and said signals corresponding to said first and second predetermined incremental note pitch values to produce a polyphonic pitch control signal; and

(i) controlling a sound synthesizer to vary its output in response to said polyphonic pitch control signal.

21. In an electronic musical instrument of the type having a body with a plurality of key controller switches each of which activates a predetermined electronically synthesized note, and in which translucent key controller switches resembling "white" piano keys are illuminated from behind by a light source such that each key controller switch may be easily seen in the dark, an improved key controller wherein each key controller switch is illuminated according to a spectral color scheme such that the key controller switch activating the lowest frequency note is illuminated by a color closest to the red end of the optical spectrum, and each other key controller switch activating successively higher frequency notes is illuminated by a proportionally higher frequency optical light, thereby allowing the user to determine, at a glance, the relative pitch of each predetermined electronically synthesized note activated by the key controller switches.

22. An electronic musical instrument comprising:

(a) a body comprising a multiplicity of controls and displays for programming and monitoring the operation of the instrument, respectively, and a predetermined number "n" of piano key control switches disposed on the body for activating pre-programmed notes generated by a synthesizer;

(b) a rigid neck with fret markings extending longitudinally from the body;

(c) a sliding hand controller member superposed on so as to freely slide longitudinally along the neck, wherein the sliding hand controller member causes the pitch of said pre-programmed notes to be uniformly altered, in real-time, as it is slid; and

(d) a matrix of fretboard switches attached to the exterior of the sliding hand controller member for emulating an "m" fretted section of an "n" stringed guitar, wherein "m" is a number between 3 and 6 and each switch in the matrix of fretboard switches when depressed raises or lowers the pitch of the pre-programmed notes by a predetermined amount.

23. A strum controller of an electronic musical instrument having a body, a neck extending from the body, and a fingerboard on the neck for producing a desired sequence of selected musical tones through an electronic tone generating means, comprising:

a first monostable on/off strum switch, normally undepressed, disposed on said body so as to be depressed by an operator'"'"'s little finger during operation of said electronic musical instrument, said first switch activating a first predetermined sequence of selected musical tones at a first rate when depressed;

a second monostable on/off strum switch, normally undepressed, disposed on said body so as to be depressed by the operator'"'"'s thumb during operation of said electronic musical instrument, said second switch activating a second predetermined sequence of selected muscial tones at a second rate when depressed;

an arm with ends respectively superposed on and fixed to each of said first and second strum switches;

a pivot disposed on the body between the first and second strum switches, said arm resting on said pivot so as to create a fulcrum about which the arm selectively actuates said first and second strum switches during operation of said electronic musical instrument; and

pressure and velocity sensing means provided in said first and second strum switches for sensing the pressure and velocity at which said first and second strum switches are actuated by said arm.

24. A pitch controller for use with a sound generator, comprising:

a controller housing with a plurality of control switches and a plurality of note activating switches mounted on a side thereof, each note activating switch causing a predetermined note to be sounded when closed;

a neck member mechanically supported by and rigidly attached to said controller housing and attached at a proximate end thereof, said neck member extending longitudinally away from said controller housing;

a slide hand controller comprising a plurality of levers for depression by one hand of a user, said slide hand controller being mounted on said neck member so as to slide longitudinally along said neck member, movement of said slide hand controller causing a hand controller position signal representing the position of said slide hand controller along said neck member to be generated and depression of one or more of said levers causing lever position signals representing the position of each of said levers to be generated;

processing means, integral to said controller housing and responsive to said plurality of control switches, for altering at least one of tone, amplitude and pitch of said predetermined note in response to said hand controller position signal and said lever position signals, for causing said altered note to be outputted by said sound generator, and for selectively outputting a user feedback information signal for identifying which of said note activating switches is closed, which of said levers is depressed and by how much, and the position along the neck member of said slide hand controller.

25. A pitch controller as claimed in claim 24, further comprising:

external processing means, operating ancillary to said processing means integral to said controller housing and responsive to said user feedback information signal and external user input, for auxiliary programming of said plurality of note activating switches and for programming the manner in which the depression of said levers alters said predetermined note during a programming mode, wherein the user inputs designated pitches to be activated by each of the plurality of note activating switches and lever depression data for altering said designated pitches when said levers are depressed during a performance mode, wherein electrical signals activating the designated pitches are generated during said performance mode when said note activating switches are depressed, said designated pitches being altered by said lever depression data when said levers are depressed, and predetermined pitches inputted via said plurality of control switches are activated by said plurality of note activating switches during said performance mode by generating electrical signals activating the predetermined pitches when the note activating signals are not so designated in said programming mode, said predetermined pitches being altered by lever depression data, inputted via said plurality of control switches, when said levers are depressed; and

a monitor receiving input from said further processing means during said programming mode and said performance mode for displaying changes in pitch of notes caused to be sounded by said note activating switches and altered by the depression of said levers and movement of said slide hand controller, for displaying the extent of depression of said levers, and for displaying the position of said slide hand controller along said neck.

26. A pitch controller as claimed in claim 24, further comprising:

a strum controller mounted on said controller housing, said strum controller comprising first and second strum switches which are open when said strum controller is not in use, said strum controller being mounted adjacent said plurality of note activating switches such that said strum controller may be actuated by a little finger and thumb of the same hand of the user which is used to actuate said note activating switches.

27. A pitch controller as claimed in claim 24, wherein said controller housing has a guitar-like shape, said plurality of note activating switches are mounted on the front side thereof, and the front side of said controller housing further includes at least one electronic display.

28. A pitch controller as claimed in claim 24, wherein said plurality of note activating switches are in the shape of white keys of a piano keyboard, said keys being arranged parallel and adjacent to each other and substantially perpendicular to the longitudinal axis of said controller housing, said note activating switches further comprising transducers for measuring the velocity and pressure with which said note activating switches are closed, the output of said transducers being inputted to said processing means for altering the amplitude and tone of said predetermined note.

29. A pitch controller as claimed in claim 28, wherein said keys are translucent and are illuminated by a light source disposed behind said keys so that each key is visible in the dark.

30. A pitch controller as claimed in claim 29, wherein each of said translucent keys are illuminated according to a spectral color scheme such that a key activating a note of the lowest frequency is illuminated by a light of a reddish color, and each other key successively activating notes of a higher frequency is illuminated by a different frequency of light.

31. A pitch controller as claimed in claim 24, wherein said plurality of note activating switches are in the shape of white keys of a piano keyboard, said keys being arranged adjacent to each other and in a semi-circular pattern conforming to the positioning of the user'"'"'s hand, said keys being wider at the end of the outer circumference of the semi-circular pattern than at the end of the inner circumference such that a continuous fan-like arrangement of keys is formed, said note activating switches further comprising transducers for measuring the velocity and pressure with which said note activating switches are closed, the output of the transducers being inputted to said processing means for altering the amplitude and tone of said predetermined note.

32. A pitch controller as claimed in claim 31, wherein said keys are translucent and are illuminated by a light source disposed behind said keys so that each key is visible in the dark.

33. A pitch controller as claimed in claim 32, wherein each of said translucent keys are illuminated according to a spectral color scheme such that a key activating a note of the lowest frequency is illuminated by a light of a reddish color, and each other key successively activating notes of a higher frequency is illuminated by a different frequency of light.

34. A pitch controller as claimed in claim 24, further comprising a stop secured to a distal end of said neck member for inhibiting further longitudinal motion of said slide hand controller in the distal direction.

35. A pitch controller as claimed in claim 24, wherein said neck member further includes exponentially spaced fret lines for indicating the position of said slide hand controller along said neck.

36. A pitch controller as claimed in claim 24, wherein said neck member further includes linearly spaced fret lines for indicating the position of said slide hand controller along said neck.

37. A pitch controller as claimed in claim 24, wherein said neck member is hollow so as to contain electrical connections which connect said processing means to said slide hand controller.

38. A pitch controller as claimed in claim 24, wherein said neck member is hollow so as to contain fiber-optical connections which connect said processing means to said slide hand controller.

39. A pitch controller as claimed in claim 24, wherein said slide hand controller communicates with said processing means through a wireless transmitter and receiver.

40. A pitch controller as claimed in claim 39, wherein said transmitter is placed in said slide hand controller and said receiver is placed in said controller housing, said transmitter transmitting said lever position signals to said receiver and being powered by a battery which is recharged whenever said slide hand controller touches said controller housing.

41. A pitch controller as claimed in claim 24, wherein said neck member is indented at regular intervals with tapered notches, the interior side of said slide hand controller comprising compressed rollers which extend as the compressed rollers pass over said notches, thereby rendering the position of said slide hand controller on said neck member perceptible by touch.

42. A pitch controller as claimed in claim 24, wherein said slide hand controller contains finger levers and a thumb lever which are designed to conform to the shape of the grasp of the user'"'"'s hand, each of said levers being fitted with a transducer for generating one of said lever position signals, each of said lever position signals being proportional to a lever depression angle about a pivot point and each of said levers being held in an extended position by a spring when said lever is not depressed.

43. A pitch controller as claimed in claim 24, wherein said slide hand controller comprises a guide key and said neck member contains a neck slot into which said guide key protrudes so as to restrain said slide hand controller from rotating about the axis of said neck member.

44. A pitch controller as claimed in claim 43, wherein said neck slot runs longitudinally along said neck member and comprises resistive strips such that said guide key electrically shunts said neck slot resistive strips to form a variable resistance circuit with a resistive value dependent upon the longitudinal position along the neck member of said slide hand controller, said variable resistance circuit outputting said slide hand controller position signal.

45. A pitch controller as claimed in claim 26, wherein said strum controller further comprises an arm that has first and second ends attached to said first and second strum switches, respectively, said arm pivoting about a pivot secured to said controller housing between said first and second strum switches.

46. A pitch controller as claimed in claim 45, wherein said first and second strum switches comprise pressure and velocity sensors which detect the pressure and velocity at which said first and second strum switches are closed.

47. A pitch controller as claimed in claim 25, wherein said further processing means comprises a ROM containing setup charts and algorithms stored therein, said ROM providing user instructions explaining the use of said setup charts, said setup charts and said user instructions being displayed on said monitor during said programming mode.

48. A pitch controller for use with a sound generator, comprising:

a controller housing with a plurality of control switches and a plurality of note activating switches mounted on a side thereof, each note activating switch causing a predetermined note to be sounded when closed;

a neck member mechanically supported by and rigidly attached to said controller housing and attached at a proximate end thereof, said neck member extending longitudinally away from said controller housing;

a slide fretboard controller mounted on said neck member such that said slide fretboard controller may slide longitudinally along said neck member, said slide fretboard controller comprising a plurality of fret divisions, each of said fret divisions containing a separate pressure sensitive switch for each of said note activating switches, wherein movement of said slide fretboard controller causes a fretboard controller position signal representing the position of said slide fretboard controller along said neck member to be generated and depression of one or more of said pressure sensitive switches causes fret depression signals representing which of said pressure sensitive switches is depressed to be generated; and

processing means, integral to said controller housing and responsive to said plurality of control switches, for altering at least one of tone, amplitude and pitch of said predetermined note in response to said fretboard controller position signal and said fret depression signals, for causing said altered note to be outputted by said sound generator, and for selectively outputting a user feedback information signal for identifying which of said note activating switches is closed, which of said pressure sensitive switches is depressed, and the position along the neck member of said slide fretboard controller.

49. A pitch controller as claimed in claim 48, further comprising:

external processing means, operating ancillary to said processing means integral to said controller housing and responsive to said user feedback information signal and external user input, for auxiliary programming of said plurality of note activating switches and for programming the manner in which the depression of said pressure sensitive switches alter said predetermined note during a programming mode, the user inputting during the programming mode designated pitches to be activated by each of the plurality of note activating switches and inputting switch depression data for altering said designated pitches when said pressure sensitive switches are depressed during a performance mode, electrical signals activating the designated pitches being generated during said performance mode when said note activating switches are depressed and said designated pitches being altered by said switch depression data when said pressure sensitive switches are depressed, wherein when the note activating signals are not so designated in said programming mode, predetermined pitches inputted via said plurality of control switches are activated by said plurality of note activating switches during said performance mode by generating electrical signals activating the predetermined pitches, and said predetermined pitches are altered by said switch depression data, inputted via said plurality of control switches, when said pressure sensitive switches are depressed; and

a monitor receiving input from said external processing means during said programming mode and said performance mode for displaying changes in pitch of notes caused to be sounded by said note activating switches and altered by the depression of said pressure sensitive switches and movement of said slide fretboard controller, for displaying the extent of depression of said pressure sensitive switches, and for displaying the position of said slide fretboard controller along said neck.

50. A pitch controller as claimed in claim 49, further comprising:

a strum controller mounted on said controller housing, said strum controller comprising first and second strum switches which are open when said strum controller is not in use, said strum controller being mounted adjacent said plurality of note activating switches such that said strum controller may be actuated by a little finger and thumb of the same hand of the user which is used to actuate said note activating switches.

51. A pitch controller as claimed in claim 48, wherein said note activating switches are parallel guitar-like strings, said guitar-like strings generating said predetermined notes when strummed or picked.

52. A method for producing polyphonic pitch control signals in real-time, comprising the steps of:

assigning note values to each of a plurality of note activating switches, each of said note values being represented by an electrical signal;

assigning a pitch increment value to an increment of movement of a slide hand controller, the pitch of each of said note values being uniformly raised or lowered by the movement of said slide hand controller;

activating a predetermined note by closing one or more of said note activating switches;

continuously generating a uniform pitch increment control signal identifying the position of said slide hand controller;

altering at least one of tone, amplitude, and pitch of said predetermined note in response to said uniform pitch increment control signal;

outputting said altered note to a sound generator;

selectively transmitting a user feedback information signal to a processing means, said user feedback information signal identifying which of said note activating switches is depressed and the position of said slide hand controller;

receiving said user feedback information signal by said processing means;

processing in real-time said user feedback information signal to determine the pitches being played by the user; and

displaying said processed user feedback information signal and user operating instructions on a display.

53. A method in accordance with claim 52, including the further steps of:

assigning up and down strumming sequences to a strum controller, said strumming sequences specifying the switches to be activated in said activating step; and

generating a sequence of said predetermined notes by activating the strumming sequences of said strum controller, the rate at which said notes are generated being determined by sensing the velocity with which said strum controller is activated.