[LAU] How to decode raw ADPCM data?

Hello, Does anyone know which tool or library i can use to decode audio data stored in a ADPCM header-less file? (8kHz, 1 channel, (12,16,25 or 32) bit) I've tried sox and libsamplerate, but both throws an error. The data are from a voice-recording machine, with very limited documentation. It says the data are "standard ADPCM". No idea whether it is IMA or VOX or MS ADPCM format. $ sox -i -t raw -r8000 -2 -c1 data.adpcm -t wav out.wav sox sox: data.adpcm: this encoding is not supported for this data size (Unsupported data format) and with sndfile: <code snip> sfinfo.format = SF_FORMAT_IMA_ADPCM | SF_FORMAT_RAW; sfinfo.samplerate = 8000; sfinfo.channels = 1; if ((fpr = sf_open ("data.adpcm", SFM_READ, &sfinfo)) == NULL) ... </code snip> thanks, -- Jozef Henzl http://popcorp.org http://chan.cz