[LAU] need just one more d/a output... spdif output on RME 9652

john gibby johnalan.gibby at gmail.com
Sun May 21 08:45:42 UTC 2017

I realized that my RME 9652 has 2 channels of output via spdif, which can
be configured to go out on the ADAT1 optical interface!  This seems like a
much better solution than using 2 sound cards, as long as I only need a
couple more channels of output.  But I'm having trouble understanding how
to make this work.  I ran hdspconf and checked the box for "SPDIF out" on
ADAT1.  But which channels do I use, like in Jack?  I see 26 system outputs
in Jack Connections.  Two of those must be the spdif outs; is it 25 and
26?  Do I disconnect my optical cable from the RME 9652 adat1 port, the one
that currently goes to my adat d/a box, connect it to the adat2 port
instead, and then connect the RME 9652 adat1 port to my spdif d/a device?

Sorry for being so clueless...

Note also that I did find a way, more than one way I think, to use 2
separate sound cards.  I can configure Jack to use a "dummy" sound card,
and In Ecasound can write directly to the different hardware devices.
Seems to work fine, though awfully non-standard.  Or I can use an alsa
application that makes the 2 sound cards look like one alsa device.  But,
until/unless I need more channels, I would much prefer to use the spdif on
the rme 9652.
Thanks very much for helping,

On Thu, May 18, 2017 at 3:48 PM, Jörn Nettingsmeier <
nettings at stackingdwarves.net> wrote:

> On 05/17/2017 08:06 PM, john gibby wrote:
>> Hi,
>> Just a little question - I have an RME9652 connected to a Tango24 to give
>> me 8 d/a outputs via ADAT; but I really need 9 outputs.  I only really need
>> ONE input, for testing/crossover design.  The 9 outputs I need are:  front
>> L/R low/mid/high, center, L/R surround.
> Hmm. You mean you want active three-way on left and right, but run the
> center fullrange? Nothing against passive designs, but I don't think it's
> wise to have a vastly different design for the center (since the rest of
> your mail sounds like you're after high quality and detailed control). So
> maybe upgrade to 16 ADAT outs anyway, to ease the pain of missing just one
> extra out? ;)
> I understand you are not going to connect the speakers via ADAT (and if
> you are, you might want to reconsider...), but there's gonna be a DA box in
> between, right?
> You could abuse the analog outs, or use the SPDIF out pair for the
> surrounds... if you need sample accuracy in the lab, it might be wise to
> measure as the output latency between ADAT and SPDIF/Analog might differ,
> but in practical use it will be negligible.
> So I'm wondering the nicest way to do get my 9 ADAT outputs.  Maybe I
>> should just look for a good deal on another Tango24... or, get a Behringer
>> 8000 d/a for less money, and use it for the L/R surround channels.
> If you go the Behringer way, get the new one (8200 I believe), they fixed
> the power supply, so the thing is less likely to die on you in a bad
> moment...
>   Both those options give me 8 more inputs that I don't really
>> need right now...  Is there something reasonable I might buy (and sell my
>> Tango24), that has ADAT, with from 10 to 16 outputs and 8 or less inputs?
> With these simple options like the ADA 8200, you really can't save much by
> leaving out the inputs. If you want to go up a notch, there's the DirectOut
> Andiamo 2 DA (no inputs), but I guess that thing is around 2k euros, and it
> only takes MADI input. And then there's the Ferrofish boxes, quite
> full-featured with ADAT and MADI I/O in addition to all the analog lines.
> --
> Jörn Nettingsmeier
> De Rijpgracht 8, 1055VR Amsterdam, Nederland
> Tel. +49 177 7937487
> Meister für Veranstaltungstechnik (Bühne/Studio), Tonmeister VDT
> http://stackingdwarves.net
> _______________________________________________
> Linux-audio-user mailing list
> Linux-audio-user at lists.linuxaudio.org
> http://lists.linuxaudio.org/listinfo/linux-audio-user
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