bpa wrote: 
> If they are BBC in origin  then they will happen on two different
> players playing same stream (not synced) at the same time.

That was a very useful test. My Squeezebox Classic, receiving a
transcoded PCM stream, quietly drifted behind the Radio, receiving a
passthrough AAC stream, at the rate of about 1 second in 12 ! I
eventually twigged that this must be due to the BBC 48000 sample rate vs
the 44100 'assumption' that I think the players must be making. I had
forgotten that PCM stream data do not include the sample rate, so
without 'out of band' knowledge, the players must make an assumption.

Adding an '-ar 44100' to ffmpeg command line fixes matters, but at great
cost in processor load.

I think the flac stream does not suffer from the same problem, in that
it seems the sample rate is embedded in the stream data, and the players
recognize it. Time will tell if that is really true.


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