[Asterisk-Users] .gsm voice format

[Steven Critchfield]

Use sox to put it is MSGSM and a RIFF header on it. 
sox file.gsm -g file.wav


You need to do this because gsm takes 160 samples and compresses it to
32.5 bytes. On unix systems, they let the half byte go to waste. On
windows they slide a second frame down a half byte and combine it with a
first frame to put 2 frames into 65 bytes.


On Mon, 2003-07-14 at 06:45, Scott Stingel wrote:
> Thanks - do you know the bit rate?
> 
> I'm trying to play these prompts with other voice application software, and
> so far have been unable to.  I've tried: Windows Media player, Vox Studio,
> Envox prompt editor  - no luck with any of these.
> 
> Cheers
> Scott
> 
> Scott M. Stingel 
> Emerging Voice Technology Inc.
> 
> Email:          scott at evtmedia.com <mailto:scott at evtmedia.com>   
> URL:            www.evtmedia.com <http://www.evtmedia.com>   
> 
> 
> 
> > -----Original Message-----
> > From: asterisk-users-admin at lists.digium.com 
> > [mailto:asterisk-users-admin at lists.digium.com] On Behalf Of 
> > Sergio Serrano Revuelto
> > Sent: Monday, July 14, 2003 12:25 PM
> > To: asterisk-users at lists.digium.com
> > Subject: RE: [Asterisk-Users] .gsm voice format
> > 
> > 
> > Gsm is wav in 8/mono
> > 
> > srsergio
> > 
> > 
> > 
> > 
> > -----Mensaje original-----
> > De: asterisk-users-admin at lists.digium.com
> > [mailto:asterisk-users-admin at lists.digium.com] En nombre de Scott
> > Stingel
> > Enviado el: lunes, 14 de julio de 2003 12:33
> > Para: asterisk-users at lists.digium.com
> > Asunto: [Asterisk-Users] .gsm voice format
> > 
> > 
> > Hello-
> > 
> > What is the .gsm format?  Ie: what's the encoding method and 
> > sample rate
> > please?
> > 
> > Thanks
> > Scott
> > 
> > Scott M. Stingel 
> > Emerging Voice Technology Inc.
> > Palo Alto, California and London, England
> > Email:          scott at evtmedia.com  
> > URL:            www.evtmedia.com  
> > 
> > 
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> > 
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> > 
> > 
> 
> 
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-- 
Steven Critchfield <critch at basesys.com>