[asterisk-users] Choice of soundfile format

[Conrad Wood]

On Wed, 2006-10-25 at 12:15 -0400, Noah Miller wrote:
> >> What soundfile format, is the one that uses least transcoding
> during playback?
> >> As I can see, I can choose wav or gsm. What sucks least cpu power, during
> >> playback to example a Zap channel? I would guess wav, but is this correct?
> 
> When you get down to it, the asterisk native format is slinear.
> Fortunately, you're in luck as Kristian Kielhofner did the asterisk
> community a big favor and had Alison re-record all the asterisk
> sounds, and he put them in slinear format.  You can find them on the
> astlinux website (there's other formats, too):
> 
> http://www.astlinux.org/index.php?option=com_content&task=view&id=38&Itemid=43
> 
> - Noah
> 

As I understand it, if you have a channel that has a given codec the
least amount of cpu power is required if the voiceprompt is recorded in
that same codec because then asterisk doesn't transcode.
Slinear is good, because you can re-encode them without loss of quality.

Conrad