Claims
- 1. An automatic accompaniment apparatus comprising:
- a circuit for producing signals representing the root and subordinate notes of a chord;
- a circuit for designating a predetermined bass degree change pattern;
- a circuit for detecting, in accordance with the designated degree change pattern, which one of a plurality of octave ranges the root and subordinate notes belong to; and
- a circuit for producing a bass tone corresponding to frequencies of the root and subordinate notes in the detected octave range.
- 2. An automatic accompaniment apparatus comprising:
- keys;
- a keyboard circuit coupled to said keys for delivering out, upon depression of a key among said keys, a signal indicating the name of a note corresponding to the depressed key;
- a self-holding circuit for receiving and holding the signal from said keyboard circuit, said signal being released to the output of said self-holding circuit when a different key is depressed;
- a chord name detection circuit for detecting the name of a chord in response to the output of said self-holding circuit; and
- a tone producing circuit receiving the output of said chord name detection circuit and producing, in response thereto, tone signals of notes constituting said chord.
- 3. In an electronic musical instrument having keys, an automatic accompaniment apparatus comprising:
- a circuit coupled to said keys for detecting, upon depression of a single key among said keys, the name of the note of said depressed key and delivering a first signal indicating said note name for the root of a chord to be audibly reproduced;
- an encoder circuit receiving said first signal and producing second signals in the form of binary digital words respectively representing names of notes for respective degree constituents of said chord;
- a selection circuit receiving said second signals and selectively delivering out a third signal constituted by a chronological alignment of at least one of said second signals;
- a decoder circuit receiving said third signal and producing fourth signals of sequentially aligned individual outputs respectively indicating notes to be audibly reproduced;
- a tone producing circuit receiving said fourth signals and producing, in response thereto, tone signals of the notes indicated by said fourth signals;
- a further decoder circuit receiving one of said second signals and producing a decoded output indicating the name of a root note of a chord to be audibly reproduced; and
- a further tone producing circuit receiving said decoded output and producing, in response thereto, tone signals of notes constituting said chord.
- 4. In an electronic musical instrument having keys, an automatic accompaniment apparatus comprising:
- a circuit coupled to said keys for detecting, upon depression of a single key among said keys, the name of the note of said depressed key and delivering a first signal indicating said note name for the root of a chord to be audibly reproduced;
- an encoder circuit receiving said first signal and producing second signals in the form of binary digital words respectively representing names of notes for respective degree constituents of said chord;
- a selection circuit receiving said second signals and selectively delivering out a third signal constituted by a chronological alignment of at least one of said second signals;
- a decoder circuit receiving said third signal and producing fourth signals of sequentially aligned individual outputs respectively indicating notes to be audibly reproduced;
- a tone producing circuit receiving said fourth signals and producing, in response thereto, tone signals of the notes indicated by said fourth signals; and
- a rhythm pulse circuit for producing rhythm pulses for said respective degree constituents, each pulse being of a rhythm pattern for the associated constituent and being applied to said selection circuit for selecting out said second signals according to said rhythm pattern.
- 5. In an electronic musical instrument having keys, an automatic accompaniment apparatus comprising:
- a chord name detection circuit coupled to said keys for detecting the name of a chord constituted by notes of depressed keys and delivering a first signal indicating the chord name;
- an encoder circuit receiving said first signal and producing second signals in the form of binary digital words respectively representing names of notes for respective degree constituents of said chord;
- a selection circuit receiving said second signals and selectively delivering out a third signal constituted by a chronological alignment of at least one of said second signals;
- a decoder circuit receiving said third signal and producing fourth signals of sequentially aligned individual outputs respectively indicating notes to be audibly reproduced;
- a tone producing circuit receiving said fourth signals and producing, in response thereto, tone signals of the notes indicated by said fourth signals;
- a further decoder circuit receiving one of said second signals and producing a decoded output indicating the name of a root note of a chord to be audibly reproduced; and
- a further tone producing circuit receiving said decoded output and producing, in response thereto, tone signals of notes constituting said chord.
- 6. In an electronic musical instrument having keys, an automatic accompaniment apparatus comprising:
- a chord name detection circuit coupled to said keys for detecting the name of a chord constituted by notes of depressed keys and delivering a first signal indicating the chord name;
- an encoder circuit receiving said first signal and producing second signals in the form of binary digital words respectively representing names of notes for respective degree constituents of said chord;
- a selection circuit receiving said second signals and selectively delivering out a third signal constituted by a chronological alignment of at least one of said second signals;
- a decoder circuit receiving said third signal and producing fourth signals of sequentially aligned individual outputs respectively indicating notes to be audibly reproduced;
- a tone producing circuit receiving said fourth signals and producing, in response thereto, tone signals of the notes indicated by said fourth signals; and
- a rhythm pulse circuit for producing rhythm pulses for said respective degree constituents, each pulse being of a rhythm pattern for the associated constituent and being applied to said selection circuit for selecting out said second signals according to said rhythm pattern.
- 7. An automatic accompaniment apparatus as claimed in claim 6 which further comprises:
- a seventh circuit for variably setting the rhythm patterns of said rhythm pulses.
- 8. An automatic accompaniment apparatus as claimed in claim 6, which further comprises:
- a note selection circuit for selecting a single note from among notes of depressed keys when the chord to be played is a special chord which cannot be detected by said chord name detection circuit; and
- means for applying the selected note to said performance circuit as the fundamental note of said special chord.
Priority Claims (4)
Number |
Date |
Country |
Kind |
50-21668 |
Feb 1975 |
JPX |
|
50-24524 |
Feb 1975 |
JPX |
|
50-24525 |
Feb 1975 |
JPX |
|
50-24526 |
Feb 1975 |
JPX |
|
Parent Case Info
This is a continuation, of application Ser. No. 659,070 filed Feb. 18, 1976, and now abandoned.
US Referenced Citations (13)
Continuations (1)
|
Number |
Date |
Country |
Parent |
659070 |
Feb 1976 |
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