[Asterisk-Users] Asterisk Native Sound Distortion (ulaw)

[Paul Hewlett]

On Thursday 29 June 2006 18:07, Kristian Kielhofner wrote:
> shadowym wrote:
> > I too have noticed problems with Asterisk native sounds using ulaw on
> > Asterisk 1.2.9.1.  Don't know about other versions but it seems to work
> > quite well in Astlinux 0.40.  In theory, since I am using ulaw for SIP
> > there is no transcoding so it is a more efficient use of CPU resources
> > and it should sound much better in general.  It does sound better except
> > for the frequent cracles, pops, and momentary dropouts which makes it
> > much more objectionable to listen to compared to the standard GSM files.
> >
> > Is there a bug report on this yet?
>
> shadowym,
>
> 	While I haven't noticed this myself, many people have pointed this out.
>   I can assure you that the prompts in AstLinux 0.4 are the same native
> prompts provided on astlinux.org.  I don't know why they seem to sound
> so much better in AstLinux than with standard Asterisk installs, but as
> I said many people have noticed this.  In theory, the native sounds
> should sound much better no matter how you play them back.  Interesting...
>
> --
> Kristian Kielhofner

   Maybe on other distros the sound files are being read from an IDe disk and 
the interrupts generated are distorting the sound - on astlinux the 
soundfiles are in a memory filesystem - no interrupts - no distortion ?

Paul
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