On 1/30/06, laulist(a)mondoseo.com <laulist(a)mondoseo.com> wrote:
 Hi All:
 I'm an analog muso (30 years+) and a Linux user (5 years+), but am totally
 new to doing audio on Linux (or any other OS).
 I've got heaps of stuff installed on a laptop running Fedora 3 (ALSA,
 JACK, Hydrogen, Muse, Rosegarden, SooperLooper,
 CheeseTracker and a lot more) but unfortunately most of it doesn't work
 yet. This is almost certainly because I don't
 understand ALSA and/or JACK properly. Also MIDI, I'm really in the dark as
 to what it is, what it does and how it works.
 I know sound works because I can play .wav samples in XMMS. Without
 starting JACK, Hydrogen runs and plays demos just
 fine as well.
 But as for Muse, Rosegarden, SooperLooper and CheeseTracker, no go. With
 SooperLooper and CheeseTracker, I can load
 samples/instruments and "play" patterns and everything appears to work (I
 can see things such as level meters etc moving
 as expected) except no sound ever emanates from the speakers.
 For example, SooperLooper. First I create a virtual soundcard (hw:1) and
 start JACK with 'jackd -d alsa'. JACK starts
 ands runs fine. Then I start SooperLooper, load a sample (.wav file) and
 off it goes apparently just fine but without
 sound.
 I have tried to connect SooperLooper and CheeseTracker (both on port 128)
 to JACK as follows but to no effect. The examples below show what I did
 for SooperLooper
 What am I doing wrong? I know the answer will probably be simple!
 TIA, Mick
 
Hi Mick,
   You appear to be running Jack in a terminal? Give qjackctl a try.
It will give you a visual patch bay where you can hook the app up to
the sound card. I suspect that the audio output of your app is not
driving the sound card.
   In a terminal I think you could do some jack command, like
jack_lsp, to see what's hooked to what, but QJC is much more useful.
Good luck,
Mark
- Mark