"William R. Zwicky" <[EMAIL PROTECTED]> writes:

> Dominique Dumont wrote:
>> I have a problem when playing dolby digital streams encoded at
>> 640kbps. This problem occurs with mplayer or 'ac3dec -C'. When playing
>> 640 kbps stream, I hear spikes (or short scratchy sounds) 4 or 5 times
>> per seconds on all channels. These spikes do not occur on silent
>> moment, only on loud moment or musical moments.
>>   
> That sounds like clipping.  Try turning down the volume at the source 
> (i.e. reduce the volume before encoding the Dolby stream.)  If that 
> works, you'll need to experiment to find out which stage of your system 
> is clipping.

I do not re-encode the AC3 streams: they are sent directly on the
SPDIF output.

And the AC3 streams are clean: there's no spikes using the analog
output of the computer.

-- 
Dominique Dumont 
"Delivering successful solutions requires giving people what they
need, not what they want." Kurt Bittner

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