[asterisk-users] TC400B and show transcoder

[Andres]

>
>
>and the card has its own interrupt -
>193:    1871532    1896779   IO-APIC-level  tc400b
>
>But when ever we need to do a transcode, ie playing back a wav file on a 
>g729 channel, the audio is complete rubbish, with a lot of stutters in 
>it (sounds like a recording does when you upload a file in the wrong 
>sample rate etc) -
>
Try to compare the frame size you are receiving from asterisk and set 
your phone to transmit the same frame size.  I would guess the card 
appears to have problems when the frame size is different.  Please try 
and report back.  I am curious about this.

> the file that we are playing back is a wav file that 
>has existed on the system and has been successfully played back with the 
>soft g729 transcoding and also plays back fine when the channel is alaw, 
>just not when the channel is g729. The same issue occurs when a 
>transcode has to happen from a handset to a IP trunk, eg alaw on the 
>handset and g729 on the trunk channel, the audio stream is non 
>comprehensible.
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>  
>
Andres
http://www.telesip.net