[MPlayer-dev-eng] A bit offtopic (just for knowledge) ADPCM

[Mike Melanson]

On Fri, 28 Dec 2001, Hetz Ben Hamo wrote:

> Pardon my stupidity,
> 
> But where have been MS ADPCM has been used in windows before? Windows 95? was 
> it to play WAV files? I know about the other codecs but not exactly about 
> this one.

	Well, I was exaggerating when I said MS ADPCM would be a huge
selling point...:) It's an older 4:1 ratio 16-bit audio codec handled,
traditionally, by msadp32.acm. It can be encoded into WAV files as well as
AVI and ASF files (since those files basically carry WAV headers). Here's
a page that has a whole bunch of classical music samples encoded in
MS-ADPCM:
  http://w3.rz-berlin.mpg.de/cmp/classmus.html

	Of course, with the advent of compression technologies like MP3
and Ogg Vorbis, no one pays much attention to ADPCM anymore. But it's
still a reasonable solution for getting some compression out of CD quality
audio.

	Hope this helps...
--
	-Mike Melanson