Dynamic chord interval and quality modification keyboard, chord board CX10

• US 5,440,071 A
• Filed: 02/18/1993
• Issued: 08/08/1995
• Est. Priority Date: 02/18/1993
• Status: Expired due to Term

• Current Assignee: Johnson, Grant
• Original Assignee: Johnson, Grant
• Inventors: Johnson, Grant
• Primary Examiner(s): Shoop, Jr., William M.
• Assistant Examiner(s): DONELS, JEFFREY
• Application Number:
  US08/019,137
• Time in Patent Office: 901 Days
• Field of Search: 84/610, 84/613, 84/626, 84/634, 84/637, 84/645
• US Class Current: 84/637
• CPC Class Codes: G10H 1/34 Switch arrangements, e.g. keyboards or mechanical switches specially adapted for electrophonic musical instruments
• CPC Class Codes: G10H 1/38 Chord
• CPC Class Codes: G10H 2210/581 Chord inversion
• CPC Class Codes: G10H 2210/591 Chord with a suspended note, e.g. 2nd or 4th
• CPC Class Codes: G10H 2210/596 Chord augmented
• CPC Class Codes: G10H 2210/601 Chord diminished
• CPC Class Codes: G10H 2210/606 Chord ninth, i.e. including ninth or above, e.g. 11th or 13th
• CPC Class Codes: G10H 2210/616 Chord seventh, major or minor
• CPC Class Codes: G10H 2210/626 Chord sixth

Abstract

The Chord Board is a revolutionary musical instrument that simplifies and expands on the traditional piano-style keyboard interface through the use of computer technology. Musicians skilled or unskilled alike will be able to take advantage of this new musical interface which makes the playing of an unlimited variety of chords and their respective note patterns not only possible, but easy. Yet the design of the Chord Board allows for an extremely complex performance from a musician who has the ability and skill to make such a performance. The Chord Board is designed to maximize the potential for the introduction of the human element into the musical performance. The player interface of the Chord Board departs significantly from the traditional piano. There are eight banks of eight keys each, three for the left hand, and five for the right hand. These keys are similar in size and shape to the traditional piano-style key, yet there are no black keys in between the white keys. Each of these piano-like keys is mapped to a specific note of a chord grouping. Therefore, it is only possible to play notes that belong to a particular chord, eliminating the possibility of playing an accidental. The chord grouping is selected from an adjacent set of chord selection buttons some of which may be selected simultaneously as modifiers, providing for well over a hundred variations of chord structure within a single chord family. Because the Chord Board is also a full-fledged MIDI controller, the instrument is not limited to a particular niche, but may be used in a variety of musical applications.

Claims

1. An electronic musical instrument comprising:

a) a plurality of sets of performance key groups (BPK and TPK) and chord selection toggle switches (CSB) which are electronically linked together as a unit (BPK-CSB-TPK), and each grouping of BPK, CSB and TPK located adjacent to one another so as to facilitate the playing of the BPK set and CSB panel with say, the left hand, and the TPK set with the right hand

wherein each electronically/physically associated BPK-TPK-CSB unit is independent from all other BPK-TPK-CSB units within the same musical instrument,

wherein each said BPK-TPK-CSB unit employs a plurality of BPK'"'"'s and TPK'"'"'s to play one or more of the notes within a user selectable chord grouping, wherein each said individual BPK and TPK plays a note unique from all other said BPK'"'"'s and TPK'"'"'s within said performance key group, and each CSB panel may be used to provide continuously variable means to alter interval and quality of selected chord group for said set of BPK'"'"'s and TPK'"'"'s, wherein said CSB panel may be used to alter the note assignment for it'"'"'s associated BPK and TPK set, whereby the chord interval, quality, octave or scale may be selected and altered instantly and dynamically during a musical performance,

b) a microprocessor used to sample the status and activity of said electronic BPK-TPK-CSB unit at regular intervals for the purpose of generating digital musical information,

c) a data transfer interface electronically connected to said microprocessor that facilitates the transfer of musical data obtained and generated by said microprocessor to and from an external communication device, such as a sound module.

2. The musical instrument of claim 1 wherein said data transfer interface conforms to the musical instrument digital interface (MIDI) protocol standard.

3. The musical instrument of claim 1 containing a group of key signature selection toggle switches which are used to choose a desired key signature which in turn alters the state of BPK-CSB-TPK units to conform to the key signature selected.

4. The musical instrument of claim 1 which has an electronic data storage and retrieval device user interface.

5. The musical instrument of claim 1 wherein said chord selection toggle switches contain a light to indicate an activated state.

6. The musical instrument of claim 1 wherein said performance keys are illuminated.

7. The musical instrument of claim 1 wherein said performance keys are grouped similarly within each of the seven chord families found within the major or minor musical scales comprised of the musical notes A, B, C, D, E, F, and G.

8. The musical instrument of claim 1 wherein said performance keys are velocity sensitive.

9. The musical instrument of claim 1 wherein said performance keys for left hand are in groups of three and said performance keys for right hand are in groups of five for each said performance key and chord selection toggle switch set.

10. The musical instrument of claim 1 wherein said chord selection toggle switches are comprised of:

a) a major/minor scale selection toggle switch,

b) an augmented modifier selection toggle switch,

c) a diminished modifier selection toggle switch,

d) a inversion modifier toggle switch,

e) an interval modifier toggle switch, for each said performance key and chord selection toggle switch set.

11. The musical instrument of claim 1 wherein said chord selection toggle switches are comprised of:

a) a major scale selection toggle switch,

b) a minor scale selection toggle switch,

c) an augmented modifier selection toggle switch,

d) a diminished modifier selection toggle switch,

e) a 1st inversion modifier toggle switch,

f) a 2nd inversion modifier toggle switch,

g) a 3rd inversion modifier toggle switch,

h) a quartal chord selection toggle switch, (a chord wherein all notes are separated by intervals of seven half steps),

i) a sus4 chord selection toggle switch,

j) a 5th interval chord selection toggle switch,

k) a 6th interval chord selection toggle switch,

l) a 7th interval chord selection toggle switch,

m) a 9th interval chord selection toggle switch,

n) a 11th interval chord selection toggle switch,

o) a 13th interval chord selection toggle switch,

p) and an option chord selection toggle switch (provided to allow for optional switching of default chord family to another chord family)

for each said performance key and chord selection toggle switch set.

12. The musical instrument of claim 1 having a case of rigid material which will accommodate the joining of BPK-CSB-TPK units.

13. The musical instrument of claim 12 wherein said case of rigid material also contains said key signature selection toggle switches, said data storage and retrieval user interface, said data communications user interface, a removable sound module, a set of speakers, a plurality of said microprocessors, and said data transfer interface within a single enclosure.

14. The musical instrument of claim 13 having a sound module that is electronically interfaced (permanent) with said microprocessor (through other than the MIDI interface) and capable of producing analog or digital sounds in response to the activation of said BPK-CSB-TPK unit.

15. The musical instrument of claim 13 having a plurality of amplified speakers used to voice the output signal from said sound module.