[linux-audio-dev] Olypus voice recorder - codec?

[Erik de Castro Lopo]

David Santinoli wrote:

> AFAICT the encoding should be (Adaptive Differential Pulse Code
> Modulation).  Don't know about the file container though...

There are at least 50 different, mutually incompatible types
of ADPCM. For instance, libsndfile supports:

	SF_FORMAT_IMA_ADPCM	/* IMA ADPCM. */
	SF_FORMAT_MS_ADPCM	/* Microsoft ADPCM. */
	SF_FORMAT_VOX_ADPCM	/* OKI / Dialogix ADPCM */
	SF_FORMAT_G721_32	/* 32kbs G721 ADPCM encoding. */
	SF_FORMAT_G723_24	/* 24kbs G723 ADPCM encoding. */
	SF_FORMAT_G723_40	/* 40kbs G723 ADPCM encoding. */

which is a mere drop in the bucket.

Erik
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  Erik de Castro Lopo
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