Sound_Pitch (changes)
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Programmer's SoundChannels Reference Manuals
» Part 15 – SWI Calls
» Sound_PitchSound
» Sound_Pitch
Sound_Pitch
(SWI &40188)
| Entry | |
|---|---|
| R0 | 15-bit pitch value: |
| bits 14 – 12 are a 3-bit octave number | |
| bits 11 – 0 are a 12-bit fraction of an octave (in units of 1/4096 octave) |
| Exit | |
|---|---|
| R0 | 32-bit phase accumulator value, or preserved if R0 ³ &8000 on entry |
Use
Converts a 15-bit pitch to internal pitch value, suitable for a voice phase accumulator oscillator.
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