Yamaha ADPCM: Difference between revisions

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(add notes about other chips which use the Yamaha ADPCM codec, and some sources)
(add note about AICA)
(2 intermediate revisions by the same user not shown)
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* Company: Yamaha
* Company: Yamaha
* Sample: http://samples.mplayerhq.hu/A-codecs/format-0x20-laugh.mmf
* Sample: http://samples.mplayerhq.hu/A-codecs/format-0x20-laugh.mmf
* ACM Codec: https://web.archive.org/web/20160323215457/http://smaf-yamaha.com/jp/tools/dl/Yamaha-ADPCM-ACM-Driver-100-j.zip


A variant of this codec is used by several Yamaha chips:
A variant of this codec is used by several Yamaha chips:
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* YMZ263B(MMA)
* YMZ263B(MMA)
* YMZ280B(PCMD8)
* YMZ280B(PCMD8)
A (possibly slightly changed) variant is used on the sound chip of Sega Dreamcast and NAOMI:
* Yamaha AICA Super Intelligent Sound Processor
The exact codec was also used by Yamaha [[SMAF]] MA-2 and onward):
* MA-2 (YMU759)
* MA-3 (YMU762)
* MA-5 (YMU765)
* MA-7 (YMU786)


The functionality of this codec is explained fairly extensively in two datasheets:
The functionality of this codec is explained fairly extensively in two datasheets:

Revision as of 18:55, 11 October 2018

A variant of this codec is used by several Yamaha chips:

  • Y8950(MSX-SOUND)
  • YM2608（OPNA) [the external ADPCM channel only]

and may also be used on the following chips:

  • YM2610(OPNB) [the external ADPCM_B channel only?]
  • YMZ263B(MMA)
  • YMZ280B(PCMD8)

A (possibly slightly changed) variant is used on the sound chip of Sega Dreamcast and NAOMI:

  • Yamaha AICA Super Intelligent Sound Processor

The exact codec was also used by Yamaha SMAF MA-2 and onward):

  • MA-2 (YMU759)
  • MA-3 (YMU762)
  • MA-5 (YMU765)
  • MA-7 (YMU786)

The functionality of this codec is explained fairly extensively in two datasheets:

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