[mythtv-users] airplay audio only from MythTV leads the iTunes computer source

Michael A Weber mweberjunk01 at gmail.com
Fri Aug 10 08:19:42 UTC 2012


Interesting.  Sadly, I don't have that issue with my Apple Airport Express.  It is always, even after hours of playing, dead-on with my iMac, and even with my previous iMac G5 with 10.5.

Oh well.  I guess I'll have to deal with it.  Thanks!


On Aug 10, 2012, at 2:57 AM, Jean-Yves Avenard wrote:

> On 10 August 2012 13:12, Michael A Weber <mweberjunk01 at gmail.com> wrote:
>> Is there a way that I can specify a small delay or a way we can add that in a future release if it's not already there?  Playing from iTunes on multiple speakers when they are not in sync can be painful if they are within a close proximity of each other.
> 
> No, and it's a far from a trivial issue.
> 
> The myth AirPlay server calculates the latency introduced by the
> network connection, the audio hardware using etc... and try to be as
> close as possible to what the iTunes client is asking for (2050ms with
> iTunes, 1780ms with iOS).
> That latency is fed back to iTunes when it asks for it.
> 
> Note that Myth is the only AirPlay server other than Apple's own
> implementing latency support. So what you get now is better than
> anything else out there.
> 
> Also note that AirPlay latency is broken with iOS clients, everytime
> you pause, rewind or fast-forward 50ms delay is added to the stream,
> after a while it's completely out of sync. You have the same issue
> when using an Apple Airport Express.
> 
> One of the issue is that iTunes doesn't reliably handle the time
> delay... Have the exact same issue when using multiple speakers
> between iTunes and Airport Express.
> 
> Jean-Yves
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