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

[Steve Davies]

On 9/12/06, John Marvin <jm-asterisk at themarvins.org> wrote:
> shadowym wrote:
[snip]
> Asterisk not padding files to
> even 20ms increments when playing them. So, although that may be a bug
> in Asterisk, I thought I would see if that was the problem by writing a
> quick C program to pad all my ulaw files to multiples of 160 bytes.
> Voila, all clicks and pops were gone. So, I don't know if that is the
> only issue, and perhaps there are other problems people are having, but
> padding the files fixed the issue for me. Obviously this should be fixed
> in Asterisk.
>
> If anyone else wants to try this experiment I've enclosed the simple C
> program I wrote below. If you compile it and call it padulaw here is how
> I fixed all the files:
>
> find /var/lib/asterisk/sounds -type f -name '*.ulaw' | xargs padulaw
>
> This program could be easily modified to pad .sln files to a multiple of
> 320 bytes (the files would be padded with 0x0000 rather than 0xff).
>
> John
>
[snip]

I don't suppose you know what the silence padding bytes would be for ALAW?

Thanks,
Steve