![]() However, as it is G.711 mu-law with minimal headers, and linear to mu-law is a low cost conversion, it is probably not worth storing in that format. The latter because converting these from other formats is expensive in CPU time.Īu is also supported by SOX and has in built support in the kernel sound card drivers. Most people should have their sound files in slin (or wav - 16 bit, linear, 8kHz, mono), together with any low bit rate codecs that they actually use (e.g. For patent reasons, mp3 needs to be handled by an external program or pre-converted. They have to be wrapped as wav for Media Player, but both are very standard when that is done.Īlthough there is support for exernal MP3 feeds, for music on hold, MP3 so far exceeds telephone sound quality (which is optimised for speech only) that it is not sensible to use it for static sound files or recording calls. sox considers slin and slin16 as raw, but can play them, if you provide the right parameters. Gsm is supported by sox, the standard command line player for LInux! It is also supported by Windows Media Player, but only if wrapped up as as wav file (Asterisk wav49 or WAV). ![]()
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