| 摘要 |
A device for detecting data of contents of accompaniment for use in an electronic musical instrument in which the detection of data representing contents of a bass accompaniment is effected independently of the detection of data representing contents of a chord accompaniment, by separately providing a first portion for indicating pitches composing a chord to be performed and a second portion for indicating the lowest pitch of a bass accompaniment pattern in a pitch indicating unit and detecting pitches indicated in the second portion. Thus, data representing contents of a bass accompaniment and data representing contents of a chord accompaniment can be separately detected, whereby the electronic musical instrument can perform a bass accompaniment independent of a chord accompaniment, and thus the variety of a performance can be increased. Further, in the device for detecting data of contents of an accompaniment, bit pattern data representing a chord to be performed as an accompaniment is generated by ORing data representing pitches of a predetermined octave-segment which correspond to pitches indicated by the pitch indicating unit in each octave-segment of the first portion, and the chord to be performed is detected by comparing the bit pattern data obtained as a result of the OR operation with bit pattern data corresponding to various chords stored in a memory, by sequentially shifting the bit pattern data obtained as the result of the OR operation, whereby even a chord in an inversion thereof can be easily and accurately detected. |
