On Wed, Jul 25, 2007 at 03:29:49PM -0400, dave cantera wrote:
> eric
> try this...
> sox foo.wav -r 8000 foo.gsm resample -ql
> # add -c1 to write the file in mono
>
> I can't remember if you have to do something special in the recording
> too.... depends on your recorder.. oh, now I remember. you have set
> the recording to 16bit 14400 hz or something like that... if I find it
> I'll re-email
> daveC
To generate a gsm encoding: -g .
So you can convert test_pcm.wav to a gsm-encoded test_gsm.wav with:
sox test.wav -g test_pcm.wav
now, you'd probably want it with the extension WAV, and hence have to
tell sox the type explicitly:
sox test.wav -g -t wav test_pcm.WAV
And let's also adjust the sample rate:
sox test.wav -r 8000 -g -t wav test_pcm.WAV
Resample, for an even smaller file:
sox test.wav -r 8000 -g -t wav test_pcm.WAV resample -ql
(didn't make a difference for my test file)
And let's make sure that the file is mono:
sox test.wav -c 1 -r 8000 -g -t wav test_pcm.WAV resample -ql
I'm not sure how many of the above are actually required.
--
Tzafrir Cohen
icq#16849755 jabber:[EMAIL PROTECTED]
+972-50-7952406 mailto:[EMAIL PROTECTED]
http://www.xorcom.com iax:[EMAIL PROTECTED]/tzafrir
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