Automatic accompaniment apparatus

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.

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.

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.

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.

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.