2016-07-03, 14:11
(2016-07-03, 14:05)loggio Wrote: Watching live TV, every now and then when I hear music eg: The Simpsons intro , the pitch of the audio shifts and makes music sound off/out of tune. Why is "sync playback to display" enabled by default on live streams?
It's not going to stay that way is it?
Yes. The clock of the server may differ from the clock of the client (typically clock accuracy is 100ppm or 0.01%).
This needs to be compensated for, and that is done through resampling the audio to keep the two ends in sync (which is what sync playback to display).
On the Pi, you can enable "PLL adjustment" in system/audio settings which avoids resampling, and so avoids the pitch warbles.
It can't handle large differences in clocks (e.g. when trying to play 24fps video on a 25Hz display), but should be fine for typical client/server clock adjustment.
