[Asterisk-Users] Re: IVR GSM voice prompt quality

[Brian Cuthie]

Is there a source for the original versions?  The GSM encoding is kind 
of rough, and I'm anything but out of disk space.

-brian

John Todd wrote:

> At 5:51 PM -0400 on 4/27/04, James H. Cloos Jr. wrote:
>
>>  >>>>> "Steven" == Steven Critchfield <critch at basesys.com> writes:
>>
>> Steven> Conversion should be nothing more than sox orig.wav orig.gsm
>>
>> Are you sure they come as signed linear 8 kHz wav files?
>>
>> The uncompressed files John has on his site are 44.1 kHz PCM
>> aiff files, so something more like this is required for optimal
>> sound quality *if* that is how Allison records the files:
>>
>> sox file.aiff -c 1 -r 8000 file.gsm resample -ql
>>
>> -JimC
>> -- 
>> James H. Cloos, Jr. <cloos at jhcloos.com> <http://jhcloos.com>
>
>
> Allison typically provides files in 44khz, 16 bit stereo .mp3's.   I 
> just convert them into .aiff during my "hack and cut" sessions, and 
> then run a batch file against them on my * host to convert into .gsm.
>
> Here is the ugly hack I use for conversion:
>
> #!/bin/sh
>
> for file in *.aif
>  do
>         sox ${file} -r 8000 -c 1 `echo $file|cut -f 1 -d "."`.gsm
>  done
>
>
> JT
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