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

[Nik Martin]

> 
> > With an app like audacity (open source sound editor) it's 
> very easy to 
> > apply a high pass filter (start at 80-100 Hz or so) to make 
> the files 
> > more audible on the 15kHz bandwidth of analog phone circuits
> 
> I thought POTS had a 3600Hz passband (400-4000Hz)?
> 
> Regards,
> Andrew

Sorry, You are correct, I'm thinking of Broadcast FM radio audio!