On Tue, 2006-01-03 at 17:50 +1100, Erik de Castro Lopo wrote: > 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. */
The data is coming out of the windows app in this format: IMA ADPCM, that is. But unfortunately, I don't seem to be having much luck discovering what codec they actually spit out of the voice recorder, prior to the application apparently converting it to 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
