[Asterisk-Users] Re: Sound file quality

[Tony Mountifield]

In article <1092050620.18336.5.camel at critch>,
Steven Critchfield <critch at basesys.com> wrote:
> On Mon, 2004-08-09 at 06:07, David Gurr wrote:
> > I'm building a phone-in demo system to use for introducing Asterisk to
> > prospective clients.
> > 
> > One of the things I'm wary of is their likely preconceptions that VoIP
> > systems will have poor audio quality.
> > 
> > As a result, I'd like to ensure that the voice prompts I'm using have
> > the best possible audio quality.
> > 
> > Is it possible to use sound files at higher than 8kHz sampling? My
> > callers will be coming in over PSTN to a VoIP gateway and then to me
> > by uLaw/aLaw ... would higher sampling rates gain me anything in this
> > configuration?
> 
> PSTN is 8khz sample rate. So obviously a higher sample rate will not get
> you any where.

However, 16-bit PCM-encoded 8kHz wav files would be a definite improvement
over the GSM-encoded ones we currently have.

I raised a feature request on bugs.digium.com (#2187) for these, and was
told it will be done sometime. I hope it's soon.

Cheers
Tony
-- 
Tony Mountifield
Work: tony at softins.co.uk - http://www.softins.co.uk
Play: tony at mountifield.org - http://tony.mountifield.org