14 Jun
2011
14 Jun
'11
6:18 p.m.
On Tue, 2011-06-14 at 16:51 +0200, Arnold Krille wrote:
On Tuesday 14 June 2011 16:03:35 Ralf Mardorf wrote:
This is what I already know, but I just was confused by the claims of
some people. And they mentioned nonsense in my native language, there
wasn't any misunderstanding. Ok, as you pointed out, it's not bad.
But people must be aware of this issue, e.g. to avoid using one RME
output and one Behringer output for the stereo sum.
The resume is, that everything here seems to be ok :) ... excepted of
the Behringer power supplies heat *lol*, but this isn't a topic for this
list.
Thank you too,
Ralf
On Tue, 2011-06-14 at 08:22 -0400, Paul Davis
wrote:
All ADAT (or any other word-clock) syncs is the sample-clock of the
processing, it doesn't sync the times the converters need to output the sample
as analog audio. And these times depend on the actual chip used. So you can't
even expect one adat-io-converter from one manufacturer and another by the
same manufacturer to be of the same "latency" because they might use different
chips inside with different conversion latencies.
To have it exactly in sync, you have to use only one kind of converters in
your setup.
Or live with the fact that one sample at 48kHz is only some centimeters of
distance, and the conversion-latency is usually below that. So its probably
okay for normal recording-, live- and playback-usage. On Tue, Jun 14, 2011 at 8:11 AM, Ralf Mardorf
<ralf.mardorf(a)alice-dsl.net> wrote:
That might be correct. The optical ADAT connection can't be used for
sync?
And as you could read I found an issue. At
Thomann (a German dealer)
they claimed there are no sync issues, what I couldn't believe. Doing
this test I found out, that there are bad phases.
You DIDN'T SYNC ANYTHING. Or at least, your description doesn't
mention any kind of sync. And if you had tried to sync, you would have
found that you CANNOT sync two A/D converters unless they are the
exact same model (so that their pre-A/D buffer is the same size).
I suspect the RME using other, better converters than the Behringer
does. This is why I expect that a completely perfect sync for the phases
might be impossible. Thomann (the dealer) claimed I'm mistaken ;), sync
is possible.
Anyway, I'll read about ADAT and sync. ADAT is new for me, since in the
earlier days it was used by semi-professional studios only, I never was
in a professional studio or home recording studio using ADAT. I guess
today it's more common than it was 'some' years ago.
I thought ADAT is similar to S/PDIF and usually S/PDIF is used to sync
identical elCheapo cards when using them as one virtual card, something
I never tried to do with my Terratec cards, instead I bought the RME.