Add note about resynchronisation.

This commit is contained in:
Mike Brady
2014-05-22 15:08:09 +01:00
parent 0b769758ce
commit 7e689cf5fa
+5
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@@ -129,3 +129,8 @@ it will print statistics like this occasionally:
For reference, a drift of one second per day is approximately 11.57 ppm. Left uncorrected, even a drift this small between two audio outputs will be audible after a short time.
It's not unusual to have resend requests, late packets and even missing packets if some part of the connection to the Shairport device is over WiFi.
Miscelleanous
-------------
Shairport 2.0 actively maintains synchronisation with the source.
If synchronisation is lost -- say due to a very busy iTunes host or a very congested network -- then Shairport 2.0 will mute its output and resynchronise. The loss-of-sync threshold is a very conservative 30 ms -- i.e. the actual time and the expected time must differ by more than 30 ms to trigger a resynchronisation. Smaller disparities are corrected by insertions or deletions, as described above.