[Asterisk-Users] sox and wav to gsm conversion quality issue

[Brian West]

sox infile.wav -r 8000 -c 1 outfile.gsm


On Fri, 22 Aug 2003, Dan wrote:

> Hi,
>
> I have some voice prompts in WAV format (PCM, 44KHz, 16bit, mono, bitrate
> 705kbps) and I want to convert them in gsm format.
> Using :
> sox file.wav file.gsm
> The result is a gsm sound file which when is played the speed is very very
> low (something like 5-6 times slower).
> Converting first to a 8KHz, 8bit mono wave file, the final gsm file is
> correct, but the quality is far than acceptable.
> The original file is at a very high quality.
>
> Which is the procedure to obtain the highest quality possible from my
> original wav file?
>
> Thanks,
> Dan
>
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