[asterisk-users] maximizing sound quality in 10.0

[Paulo Santos]

On Ter, 2011-12-27 at 13:34 -0600, Danny Nicholas wrote:
> Hi list,
> 
>             I have a set of 300 or so WAV files I was combining and
> playing using playback/background in 1.4.X.  Now that I have moved on
> to the 10.0 set, I understand that I can replace my 8 Khz mono files
> with virtually unlimited Khz mono files (still no stereo, but a
> quantum leap forward).  I’ve played with this and get good throughputs
> using SLIN44 formats on SIP.   The 2 questions I have are:
> 
> 1.       Is Slin44 the format I should be settling on or has someone
> found a combination they find preferable?
> 
> 2.       While the SIP connections sound good, I still have to “talk”
> through OBI110 DADHI devices and other UUCM type connections – any
> pointers for juicing up the sound there?

I'm not sure, but unless you're strictly talking through SIP _and_ using
devices that support more than 8KHz, you won't take advantage of more
than that.

I believe that ISDN (BRI or PRI) and analogue lines as well as most
phones use 8KHz.

But, like I said, I'm not sure. Maybe someone can confirm that? I got
curious myself.