[asterisk-users] Poor audio quality with TDM400 card

[Noah Miller]

Hi Leotis -

> When i run fxotune -i i get the following output:
>
> sudo fxotune -i
> Tuning module /dev/zap/1
> Done!
> /dev/zap/2 absent: No such device or address
> /dev/zap/3 absent: No such device or address
> /dev/zap/4 absent: No such device or address
> /dev/zap/5 absent: No such file or directory
> /dev/zap/6 absent: No such file or directory
> /dev/zap/7 absent: No such file or directory
> /dev/zap/8 absent: No such file or directory
> /dev/zap/9 absent: No such file or directory
> /dev/zap/10 absent: No such file or directory
> /dev/zap/11 absent: No such file or directory
>
> is this the expected output ?

Yes, if you only have one Zap channel configured.

If you specifically have problems playing back gsm files, make sure
you're not dealing with the gsm playback bug.  Basically, if you
compiled with the default options using GCC 4.2, gsm transcoding may
be distorted. See here:

http://bugs.digium.com/view.php?id=11243


- Noah