Music – Instruments – Electrical musical tone generation
Patent
1995-10-06
1997-10-14
Shoop, Jr., William M.
Music
Instruments
Electrical musical tone generation
84622, 84659, G10H 700, G10H 706
Patent
active
056775032
ABSTRACT:
A tone generator has a waveform memory which stores waveform data at least having a loop section defined by a loop start address and a loop end address for repetitive reading out. An address-generating circuit generates a readout address by which the waveform data is read out from the waveform memory and delivers the readout address to the waveform memory to read out the waveform data from the waveform memory. A bit mask circuit masks a predetermined range of more significant bits of the readout address to generate a bit-masked address value. When it is determined that the readout address falls outside the loop section at least at one side of the loop start address and the loop end address of the loop section, a looping readout address generated by the use of the bit-masked address value is delivered as the readout address.
REFERENCES:
patent: 5194681 (1993-03-01), Kudo
patent: 5512896 (1996-04-01), Read et al.
Fletcher Marlon
Shoop Jr. William M.
Yamaha Corporation
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