[LAU] RME analog out of phase to ADAT connected Behringer analog out

Ralf Mardorf ralf.mardorf at alice-dsl.net
Tue Jun 14 11:09:07 UTC 2011

On Mon, 2011-06-13 at 16:04 +0200, Arnold Krille wrote:
> On Monday 13 June 2011 15:14:24 Paul Davis wrote:
> > On Sun, Jun 12, 2011 at 10:37 PM, Ralf Mardorf
> > <ralf.mardorf at alice-dsl.net> wrote:
> > > I made a sound check, that isn't a valid test, just a test to get a
> > > coarse impression, but it's positive that for the 'RME analog out / ADAT
> > > out test' the signals were out of phase.
> > I have no idea why you would expect two analog signal paths with
> > independent D/A conversion would ever be in phase.
> That is actually what broadcasting has a problem with. Good equipment would 
> tell the driver/alsa/jack about its additional latency so that apps or jack 
> can sync accordingly. Add a global clock and timestamps per sample / 
> sampleblock and system-wide guaranteed latencies...

I guess in other countries they are less petty as we are or at least
were for broadcasting here in Germany, regarding to what is allowed for
airplay. Years ago it wasn't seldom that reports with minor phasing
issues were played "einbeinig" (one-legged, muting one channel and using
the kept channel for left and right).



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