Music – Instruments – Electrical musical tone generation
Patent
1990-06-29
1992-10-27
Witkowski, Stanley J.
Music
Instruments
Electrical musical tone generation
84DIG2, G10H 122, G10H 500
Patent
active
051591448
ABSTRACT:
An electronic musical instrument allots musical tone-generating channels to new musical tones by calculating an integrated residual generated volume or a substitute values corresponding thereto for each current musical tones; and determining which of musical tone-generating channels has a minimum such volume or substitute value. The instrument may, alternatively, allot a tone generating channel for a new musical tone by detecting a minimum envelope level of those already allotted musical tones; selecting those channels having envelope levels falling within a determined range defined based on and including the detected minimum level; and determining which channel selected by the selecting means has a minimum residual generated volumes or substitute values corresponding thereto. The residual generated volumes are determined by an equation: ##EQU1## wherein V(t) is an envelope level at an instant "t" during a period from the given instant "t.sub.o " and to the end point "t.sub.end " of the musical tone. The substitute values are given by a further equation;
REFERENCES:
patent: 4703680 (1987-11-01), Wachi et al.
Fujisawa Minoru
Nunoyama Tetsuaki
Otsuka Satoshi
Roland Corporation
Witkowski Stanley J.
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