[LAU] USB audio hotplug

[Len Ovens]

On Mon, 9 Mar 2020, Jacek Konieczny wrote:

> On 07.03.2020 15:35, Mac wrote:
>> I have used UbuntuStudio for quite a while. And, when IO plug in a USB 
>> audio device it magically appears on the port list (for example in Carla).
>
> > I find myself attempting to set up a Debian 10 system and would like 
> the same to happen.
>
> It is the 'autojack' script from the UbuntuStudio Controls package that 
> does this magic. Maybe it is possible to install that package in Debian, 
> or you could just try to update and install that script manually.

You can either remove Cadence which, because it does the same kinds of 
things, does not work at the same time. Or you can hack autojack to remove 
most of it's funtionality except the part that monitors the system dbus 
for USB audio device plugin events and runs zita-ajbridge to connect it to 
jackd that Cadence has already run. Or create your own script that does 
this.

That is only if using zita-ajbridge does what you want. It will not change 
the jack master to the USB device when it is plugged in unless the whole 
of studio-controls is used. As far as that goes, this second option is the 
better of the two options in my opinion.

Note that if you only use the utilities Cadence ships with and not Cadence 
itself... and never run Cadence.... feel free to hack the Studio-controls 
package to remove the part that does not allow the two to be installed 
together or unpack the thing with an archive manager and install the bits 
you want manually. However, it is unlikely the author of either package 
will support that kind of use.  :)

It should be possible to run cadence and Studio-controls together if 
Studio-controls was to detect Cadence as being used and stayed out of it's 
way mostly. But that has not been done (and is not likely).

--
Len Ovens
www.ovenwerks.net