Re: [SoX-users] converting from .gsm to .mp3

[Chris B. <ch...@cn...>]

Ketema J. Harris wrote:
> hello, i am trying to convert gsm files created by the asterisk pbx to 
> mp3 format.  i am using the sox command:
>
> sox -t gsm input.gsm output.mp3
>
> the file is created, but plays back at a very high speed.  i then 
> tried to add speed 0.5 at the end and the sound was slowed, but 
> quality was horrible.
>
> conversion to wav worked fine, but then a conversion to mp3 from wav 
> yielded the same high speed results as the first trial.
>
> what can i do to convert .gsm to .mp3 ?
>
> Thanks!
>
Can you run SoX with "-V" option and send the output?  Maybe your 
running an older version that has some bug I don't remember causing 
this.  Probably, the MP3 is being created as "stereo" but your feeding 
"mono" data into it somehow... This will cause it to play back to fast.

I couldn't reproduce the problem with current CVS version of SoX.

Chris