LinuxMusicians

I'm also still trying to figure out how to make an "aggregate device" in alsa such that I can combine both my little audio interfaces (m-audio/focusrite, 2 in 2 out each) into one larger virtual interface for jack. You can make jack see both interfaces at the same time by using zita-aj2br...

I suggest you should read http://www.jackaudio.org/faq/multiple_devices.html to learn why jack was not designed to work with multiple devices. And, of course, the workaround :) . However, instead of the alsa_in / alsa_out jack clients, an equivalent but better option is the zita-ajbridge http://kokk...

Probably the Zoom won't have a software level control. alsamixer in a terminal will tell you more clearly. First do a: cat /proc/asound/cards If the Zoom turns out to be, say, card #2, then run: alsamixer -c2 Are there any controls for the output level? If not, you just can't use kmix to achieve wha...

I just made a quick search and I hope these links help. I think the first one will work for audio (and then use the pulseaudio jack sink) and the second one might or might not work for MIDI.

https://wiki.archlinux.org/index.php/PulseAudio#OSS
http://alsa.opensrc.org/OSS_emulation

Where is this "KXStudio" sub-forum? I have read the forum index page three times and can't find anything that even sounds like it.

It's under "Linux distributions and other software"

Welcome! We linux users sooner or later discover that "user" tasks and administrative tasks (like for example installing software system-wide) are essentially different. For the later we need to go the phone booth and change into Superuser! :) Superuser can do anything, including opening t...

I understand now, but don't know why this happens.

What are the outputs of
cat /proc/asound/cards
and
lsof | grep /dev/
while Jack is up and running with the Scarlett?

Is that an xrun? Maybe a period size too low? Do you need very low latency? Why not just the default -p 1024 instead of 128?

If I understand correctly, you need that Jack recognises the two input devices, the Scarlett and the webcam, at the same time. If so, I suggest you use zita-a2j, after you start jack with the Scarlett. You should get it to work with something like: zita-a2j -dhw:WEBCAM where you must substitute WEBC...

To clarify further, in your case jack was started with the wrong audio interface.
You need to restart jack with a proper setup.

You have to tell jack explicitly which soundcard(s) to use. The easiest and most obvious option is using the usb device for input and the onboard audio card for output (in qjackctl's setup). Click the little horizontal arrows on the right to see the available audio devices. However, I don't know if ...

The alsa driver doesn't see anything controllable in this audio interface. Probably because the AI is designed to not expose any control because it already has hardware controls for all that is needed. Nothing to worry about, I would say.

From the point of view of Rosegarden, Qsynth is an external synth, so you can't select different musical instruments via the rosegarden dialogs ... in Qsynth However, you can use the fluidsynth dssi plugin in place of qsynth ("fluidsynth-dssi" is the name of the debian package, I suppose i...

If the problem has to do with virtual (jack) connections, patchage is a great diagnosing tool for this.
You can split the ardour box for a better view. You can connect/disconnect input/outputs directly in patchage, too.

For my tests to help Mister Mint, I am importing a midi file I created via lilypond. This file has three instruments and I can play it perfectly in audacious via a-midi plugin (which is also fluidsynth) and the FluidR3_GM sf2. There's one thing I don't understand, when you import a midi track in ard...