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Dieter Spaar spaar at mirider.augusta.deHello, Regarding questions how to use the ETSI codec: It consists of two steps, "cdecoder" and "sdecoder". The ouput of "sdecoder" is raw sound in signed 16-Bit PCM format with 8000 samples/second. For example Audacity can play it without problems. (And no, its no "magic", it just requires to read a few comment lines in the source code of the codec). Best regards, Dieter -- Dieter Spaar, Germany spaar at mirider.augusta.de