Yamaha ADPCM: Difference between revisions

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(adpcm_yamaha is in ffmpeg since 2005 btw. need spb sample.)
m (clarify 'codec' link)
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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


This codec is used by YM2608(OPNA) chip.
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)
The 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:
* Y8950 application manual: http://www.datasheetarchive.com/pdf/download.php?id=212962c2fe1b63fdc5ab320ca05ff3efefc925&type=M&query=y-8950
* YM2608 datasheet (Japanese): http://nemesis.hacking-cult.org/MegaDrive/Documentation/YM2608J.PDF
* Translated version of YM2608 datasheet: http://nemesis.hacking-cult.org/MegaDrive/Documentation/YM2608J%20Translated.PDF


[[Category:Audio Codecs]]
[[Category:Audio Codecs]]

Revision as of 19:05, 28 October 2017

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)

The 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: