furnace/doc/7-systems/ymz280b.md

# Yamaha YMZ280B (PCMD8)

8-channel PCM/ADPCM sample-based sound chip designed for use with arcade machines. it lived throughout mid to late 90s.

it has 16-level stereo panning, up to 16-bit PCM and up to 16MB of external PCM data. 4-bit ADPCM has a sample playback rate limit of 44.1 kHz with a tuning resolution of 256 Hz, while 8-bit and 16-bit PCM can go up to 88.2kHz with a tuning resolution of 512 Hz.

## effects

none so far.

## info

this chip uses the [YMZ280B](../4-instrument/ymz280b.md) instrument editor.

4-bit ADPCM format can be selected in the sample editor as "YMZ/YMU ADPCM". for this format, loop start and end points must align to multiples of 2 samples, and samples will be padded to a multiple of 2 samples.

PCM samples have a maximum playback rate of the chip's clock divided by 192.

## chip config

the following options are available in the Chip Manager window:

- **Clock rate**: sets the rate at which the chip will run.
docs update (#519) * docs update mentions of fractal, new chips documentation, and other minor stuff * add a link to the Fractal repo as suggested by @breakthetargets * better wording, less typos 2022-06-06 16:49:39 +02:00			`# Yamaha YMZ280B (PCMD8)`

lots of doc updates 2022-10-16 00:53:05 -05:00			`8-channel PCM/ADPCM sample-based sound chip designed for use with arcade machines. it lived throughout mid to late 90s.`

Teensy fixes. Typos and odd wording. 2025-09-29 15:34:29 -07:00			`it has 16-level stereo panning, up to 16-bit PCM and up to 16MB of external PCM data. 4-bit ADPCM has a sample playback rate limit of 44.1 kHz with a tuning resolution of 256 Hz, while 8-bit and 16-bit PCM can go up to 88.2kHz with a tuning resolution of 512 Hz.`
docs update (#519) * docs update mentions of fractal, new chips documentation, and other minor stuff * add a link to the Fractal repo as suggested by @breakthetargets * better wording, less typos 2022-06-06 16:49:39 +02:00
only one header per doc file 2023-09-10 19:34:13 -05:00			`## effects`
docs update (#519) * docs update mentions of fractal, new chips documentation, and other minor stuff * add a link to the Fractal repo as suggested by @breakthetargets * better wording, less typos 2022-06-06 16:49:39 +02:00
			`none so far.`
Documentation stuff! New page for the effect list, updates to chanOsc, and links to instrument types from every "system" page. 2023-08-04 09:11:53 -07:00
only one header per doc file 2023-09-10 19:34:13 -05:00			`## info`
Documentation stuff! New page for the effect list, updates to chanOsc, and links to instrument types from every "system" page. 2023-08-04 09:11:53 -07:00
don't mention Generic Sample ins type on sample ch ips that have their own ins types 2023-09-10 23:57:46 -05:00			`this chip uses the [YMZ280B](../4-instrument/ymz280b.md) instrument editor.`
document chip options 2024-07-06 14:52:07 -05:00
Many doc updates. Settings changes, interface niceties, and a ton of info about sample limits. 2025-09-27 17:17:07 -07:00			`4-bit ADPCM format can be selected in the sample editor as "YMZ/YMU ADPCM". for this format, loop start and end points must align to multiples of 2 samples, and samples will be padded to a multiple of 2 samples.`

			`PCM samples have a maximum playback rate of the chip's clock divided by 192.`

document chip options 2024-07-06 14:52:07 -05:00			`## chip config`

			`the following options are available in the Chip Manager window:`

			`- Clock rate: sets the rate at which the chip will run.`