furnace/doc/7-systems/segapcm.md

# 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.
system doc work 2022-03-22 05:58:07 +00:00			`# SegaPCM`

			`16 channels of PCM? no way!`

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

update Bubble System and SegaPCM docs 2022-05-13 08:18:29 +00:00			`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.`
system doc work 2022-03-22 05:58:07 +00:00
update several things - including an Amiga fix 2022-10-16 03:41:50 +00:00			`# 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).`

system doc work 2022-03-22 05:58:07 +00:00			`# effects`
lots of doc updates 2022-10-16 05:53:05 +00:00
Lots of little cleanup. Trying for more consistency and clarity, especially for quick reference. 2023-06-25 07:05:30 +00:00			- `20xx`: set PCM frequency.
system doc work 2022-03-22 05:58:07 +00:00			- `xx` is a 256th fraction of 31250Hz.
Lots of little cleanup. Trying for more consistency and clarity, especially for quick reference. 2023-06-25 07:05:30 +00:00			`- this effect exists mostly for DefleMask compatibility; it is otherwise recommended to use Sample type instruments.`