[LAU] Multiple sound cards

Max abonnements at revolwear.com
Thu Jun 10 11:47:56 CEST 2021

An (easier) alternative is to use zita-j2a (zita-a2j for input), I'm 
surprised that's not even mentioned on that page. It takes care of the 
resampling when clocks drift.

On 10.06.21 11:35, Alf Haakon Pietruszka Lund wrote:
> Hello list!
> I am on (K)Ubuntu Studio 20.04) and needed a couple of extra in- and 
> outputs, so I connected 2 USB audio interfaces to my computer (a 
> FocusRite Scarlett 2i4 and an Edirol UA-25ex - they're old, but reliable 
> devices).
> Through Studio Controls I set the Scarlett as master device and started 
> Jack, then I experienced recording and playback with Ardour in (as far 
> as I can hear) perfect sync.
> I was amazed at the ease of this setup and the problem-free routing of 
> audio signals, so just for testing I split a stereo source recording one 
> channel on each device to one stereo track in Ardour. To my ears, the 
> sync is still perfect.
> However, from this article 
> https://jackaudio.org/faq/multiple_devices.html it seems I have to 
> expect sync problems over time unless I do some manual configuring using 
> the alsa_in and alsa_out clients.
> Is this still valid?
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