[Asterisk-Users] Audio format for announcements

[Andrew Thompson]

----- Original Message -----
From: "Sean Adams" <sadams at slimdevices.com>
To: <asterisk-users at lists.digium.com>
Sent: Monday, December 22, 2003 10:50 AM
Subject: [Asterisk-Users] Audio format for announcements


>
> Hi guys. First off, to the folks at Digium: outstanding work. The fact
> that Asterisk is open source puts you right at the cusp of what will be
> the most important telecom advance since the transatlantic cable.
>
> Anyway... a couple newbie questions concerning sound quality - I don't
> see any reason why the system should not use the best possible format
> for any given connection.
>
> 1) Is it possible to store the menu sounds in wav/aiff, and let
> asterisk compress them to gsm only as necessary? Eg for POTS lines, yes
> the lines are crap already, but why butcher the sound any further by
> running it through a speech codec?
>
> 2) For my internal SIP phones, I don't care about bandwidth usage. What
> settings will give the best sound quality?  Does the protocol (or for
> that matter, any particular brand of phones) support uncompressed or
> very high bit rate audio for intra-pbx calls?
>

Can't help with the first question, but ulaw/alaw ~= g711, which I think is
the biggest eater of bandwidth that I've heard of.

See: http://www.voip-info.org/wiki-Codecs

-----
Andrew Thompson http://aktzero.com/
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