Music – Instruments – Electrical musical tone generation
Patent
1992-02-21
1994-11-22
Witkowski, Stanley J.
Music
Instruments
Electrical musical tone generation
84607, 84626, 84627, 381 61, G10H 1057, G10H 702
Patent
active
053671180
ABSTRACT:
Waveform data written in a RAM 2 base on write addresses is always read out as two waveform data from two read addresses 1 and 2 designated by a CPU 1, and two interpolation data 1 and 2 are formed. A smaller address difference A between the write address and the read address 1 is multiplied with the interpolation data 1 as an envelope value to obtain cross-fade data 1. Similarly, cross-fade data 2 corresponding to the read address 2 is obtained. The two items of cross-fade data 1 and 2 are added to each other to obtain output waveform data. An envelope value of waveform data near a waveform discontinuous point becomes almost zero, and click noise can be eliminated.
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Casio Computer Co. Ltd.
Witkowski Stanley J.
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