It can't possibly have anything to do with "power line conditions" since
the power input to the Squeezebox is DC, not AC.  "Power line
conditions" impacting time sync is -- and I do know a little bit about
this, since one thing I used to do for a living was design digital
carrier circuits for a telco -- something that went the way of the
dinosaur with the General Electric 60Hz electromechanical alarm clock
many of us had by our bedsides as kids. ;-)

I'm more than a little surprised that the units can't keep tight sync
over the course of a song.  They have an accurate oscillator of more
than sufficient frequency available to drive the digital output -- if
they didn't, it would have fierce bit sync problems, bad enough to be
audible as glitches.  Perhaps the digital output IC they use doesn't
expose this clock to the rest of the system, or perhaps the rest of the
hardware design doesn't allow its use to keep frames in sync during
playback.

Temperature variations would make sense except that my two units are in
adjacent rooms.  Basically, I have to ask "just how crappy are the
system clocks on these devices, anyway?" since you'd need a *really*
bad oscillator to slip by half a second over the course of a few
minutes, which is what I'm seeing.


-- 
tls
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View this thread: http://forums.slimdevices.com/showthread.php?t=24380

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