Sound_SoundLog (changes)
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Programmer's SoundChannels Reference Manuals
» Part 15 – SWI Calls
» Sound_SoundLogSound
» Sound_SoundLog
Sound_SoundLog
(SWI &40181)
| Entry | |
|---|---|
| R0 | 32bit signed linear sample |
| Exit | |
|---|---|
| R0 | 8 bit mu-law logarithmic sample |
Use
This SWI is used to convert a signed linear sample to the 8 bit logarithmic format that’s used by the 8 bit sound system. The returned value will be scaled by the current volume (as set by Sound_Volume).
Notes
Voice generators should avoid calling this SWI from within their buffer fill code – the overhead of calling a SWI for every sample to write will be too much for older systems to cope with.
See also
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