A fast and easily customised operating system
for ARM devices
Sound Pitches
Programmer's Reference Manuals
» Part 15 – SWI Calls
» OS
» OS_Byte
» OS_Byte 213
» Sound Pitches
Sound Pitches
| Pitch | |
|---|---|
| 0 – 255 | BBC style pitch (increase by 4 for one semitone) |
| &0100 – &7FFF | Enhanced pitch control : &offf |
| &o000 is octave | |
| &0fff is fraction of octave | |
| &4000 is usually middle C though this depends on the sample | |
| &8000 – &FFFF | Phase accumulator increment (?) |