[LAD] Is it possible to use two RME cards in sync?

[Frank Smith]

HI
I to would like the same info as I have two cards using adat to two DDX
mixes.
Would be nice to use both cards and not spend out on another mobo/card.
It's all running nice at the moment with 64studio

Cheers
Bob




On 10 May 2010 18:04, Pau Arumí <pau.arumi at barcelonamedia.org> wrote:

> El dl 10 de 05 de 2010 a les 17:32 +0200, en/na Florian Faber va
> escriure:
> > Pau,
> >
> > > the system i need to build should have 8 AES inputs and 24 AES outputs.
> > > For that, i see two basic approaches 1) using two RME AES-32 (*) cards
> > > in world-clock synch and 2) using a RME hammerfall with 24 ADAT
> > > input/outputs and then several 8ch ADAT<->AES converters such as the
> > > Aphex 144 (+), which costs about 400€ each 8ch unit.
> >
> > 3) a MADI interface and any MADI-to-ADAT converter you want
>
> Right. But the MADI-to-AES alone (the ADI-6432) costs about 2800€. Far
> beyond 1) and 2).
>
> > What are those AES ports needed for anyway? I mean, this are 16 channels
> > in and 48 channels out. With that number of channels, using AES just
> > becomes a pita. Think of the cabeling alone - or use Tascam-style 25 pin
> > DSUB connectors.
>
> Yes AES makes it all over complex but it is a requirement not a
> decision. It is all about connecting to existing boxes.
>
> > > Option 1 seems to me simpler and cheaper but i ignore if is feasible
> and
> > > reliable: Have anyone had good experiences using two clock-synced RME
> > > cards with jack?
> >
> > The driver can start the buffers synchronously, so you have
> > sample-synchronous output. To have jack working with multiple cards, you
> > can either use alsa magic to combine the cards, or use alsa_out (with
> > disabled resampling).
>
> Will try that with a couple of hammerfall 9632 we have in the lab before
> buying the (two) AES-32.
> Any recommended documentation or advice?
> (Apart from this: http://alsa.opensrc.org/index.php/TwoCardsAsOne)
>
> Thanks
> P
>
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