As Jeanette noted, it's possible but not simple.
I documented the process for Delta 1010 cards at
http://delta.brainiac.com/deltasync.html
You don't *have* to have the cards' clocks synced to make a combined device,
but if you don't the drift apart will become apparent before long.
On Thu, 30 Mar 2017 13:49:21 +0200 (CEST)
"Jeanette C." <julien(a)mail.uni-paderborn.de> wrote:
Mar 30 2017, Bill Purvis has written:
...
Is it possible to have more than on
audio output
here?
Hi Bill,
as far as I know, there are only two choices: if the soundcards are of
similar make, you might link them by using worldclock and then make a
multi device in ALSA. This at least works for the Delta 1010 soundcards.
Then there is alsa_in and alsa_out, which can make JACK ports from other
ALSA devices. IIRC the work fine these days.
I can think of no direct way to connect more than one soundcard to JACK.
HTH.
Best wishes,
Jeanette
...
--------
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