[Asterisk-Users] Sound files quality and volume

[Anton Krall]

I just noticed that quality of .gsm files for using with asterisk is not
that good.. is there any way to make then sound better? asterisks sample
voices sound way better than theones recorded using applications like
wavepad or with asterisk like unavailable messages... any tips? Do you know
the command line for sox to adjust the volumen levels or gsm files (make the
louder)?
 
Also, do they have to be .gsm?
 
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Anton Krall