furnace/doc/7-systems/segapcm.md

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# SegaPCM
16 channels of PCM? no way!
yep, that's right! 16 channels of PCM!
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a chip used in the Sega OutRun/X/Y arcade boards. eventually the MultiPCM surpassed it with 28 channels, and later they joined the software mixing gang.
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# 5-channel SegaPCM
Furnace also has a five channel version of this chip, but it only exists for DefleMask compatibility reasons (which doesn't expose the other channels for rather arbitrary reasons).
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# effects
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- `20xx`: **set PCM frequency.**
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- `xx` is a 256th fraction of 31250Hz.
- this effect exists mostly for DefleMask compatibility; it is otherwise recommended to use Sample type instruments.
# info
this chip uses the [SegaPCM](../4-instrument/segapcm.md) and [Generic Sample](../4-instrument/amiga.md) instrument editors.