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furnace/doc/7-systems/segapcm.md
Electric Keet 81ab2acb2c Lots of little cleanup. 
Trying for more consistency and clarity, especially for quick reference.
2023-06-25 00:05:30 -07:00

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SegaPCM

16 channels of PCM? no way!

yep, that's right! 16 channels of PCM!

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.

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).

effects

  • 20xx: set PCM frequency.
    • xx is a 256th fraction of 31250Hz.
    • this effect exists mostly for DefleMask compatibility; it is otherwise recommended to use Sample type instruments.