[LAU] Jackd ... add device

[James Harkins]

S C Rigler <riglersc at ...> writes:

> On Thu, Jan 31, 2013 at 2:59 PM, Bob van der Poel <bob at ...> wrote:
> > Now, I want to plug in a usb microphone in addition to the other
> > device already running. So, the question becomes: How do I add a 2nd
> > device to an already running jackd? Or do I need to tell jack when it
> > starts to use 2 devices (again, how?). And, will audacity catch on to
> > this?
> >
> 
> In this case I would probably start jack using the USB audio interface
> and use alsa_in for the microphone.

FWIW, I tried alsa_out once upon a time, to handle a 4-channel-out USB interface 
that appears to Linux as two stereo devices. It was a complete disaster. After 
booting Jack and launching alsa_out, it took between 5 and 10 minutes before the 
devices would synchronize. Before that, constant glitching. Then, if I left the 
devices silent for a time, they would go out of sync again after a few minutes. 
More glitching.

At that point, I started to feel that was no longer a viable solution to 
explore. I (still) wouldn't trust alsa_out or _in for anything serious.

YMMV.

hjh