No audio output from Rosegarden in Ubuntu Studio

[richardcookson]

On a clean install of Ubuntu Studio, after setting up and running Jack, apparently without any problems, midi output from Rosegarden doesn't produce any sound.

According to the AconnectGUI and Jack's 'Connections' dialog everything is connected as it should be with Rosegarden midi devices routed through TiMidity, but no sound is produced.

Playing midi files directly through TiMidity works fine.

Jack messages:

21:48:19.960 Patchbay deactivated.
21:48:20.037 Statistics reset.
21:48:20.109 Startup script...
21:48:20.109 artsshell -q terminate
JACK tmpdir identified as [/dev/shm]
JACK tmpdir identified as [/dev/shm]
21:48:20.177 MIDI connection graph change.
can't create mcop directory
Link points to "/tmp/ksocket-richard"
21:48:20.725 Startup script terminated with exit status=256.
21:48:20.725 JACK is starting...
21:48:20.726 /usr/bin/jackd -R -dalsa -dhw:0 -r44100 -p64 -n2 -D -Phw:0 -m
21:48:20.731 JACK was started with PID=5610 (0x15ea).
jackd 0.103.0
Copyright 2001-2005 Paul Davis and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
JACK compiled with System V SHM support.
loading driver ..
apparent rate = 44100
creating alsa driver ... hw:0|hw:0|64|2|44100|0|0|nomon|swmeter|-|32bit
control device hw:0
21:48:20.957 MIDI connection change.
configuring for 44100Hz, period = 64 frames, buffer = 2 periods
ALSA: final selected sample format for capture: 16bit little-endian
ALSA: use 2 periods for capture
ALSA: final selected sample format for playback: 16bit little-endian
ALSA: use 2 periods for playback
21:48:22.980 Server configuration saved to "/home/richard/.jackdrc".
21:48:22.986 Statistics reset.
21:48:23.271 Client activated.
21:48:23.276 Audio connection change.
21:48:23.292 Audio connection graph change.
JACK tmpdir identified as [/dev/shm]
21:49:51.400 Audio connection graph change.
21:49:52.305 Audio connection graph change.
21:49:52.335 Audio connection change.
21:49:52.514 Audio connection graph change.
21:49:52.564 MIDI connection graph change.
21:49:52.597 MIDI connection change.
21:49:59.010 Audio connection graph change.
21:49:59.188 Audio connection change.
21:52:36.996 MIDI connection graph change.
21:52:37.011 MIDI connection change.
21:52:37.034 MIDI connection graph change

Soundcard details;
SIS SI7012 with ALC655

I'm not sure where the bug is as everything appears to be working OK, apart from the lack of sound, hence I'm not sure what information to submit with the report.

[Daniel T Chen (crimsun)]

Is this symptom still reproducible in 8.10?

[rdb (rdb)]

Yes, same issue here with 8.10.

[Lorenzo Bicci (bicci)]

Same problem in Ubuntu Studio 10.04 amd64.

[Marc Brevoort (kleinebre)]

Same problem here on vanilla Ubuntu 10.4. All Jack connections set up, there's no audio.
The audio mixer does not show any signal.

Interestingly, when playing audio from the Audio File Manager, there *is* audible JACK
playback and signal is showing in the audio mixer of Rosegarden both on Audio #1
and master volume as well as the mini vu meter in the first audio track.

However when the audio track is tragged to channel 17 (untitled audio) and assigned
Audio #1 and Play is clicked on main transport control, there is no sound at all. I have
verified that the channel is not muted.

[Marc Brevoort (kleinebre)]

(Rosegarden 10.2, build key 651014598d)

[Ted Felix (tedfelix)]

Timidity assumes output to ALSA. If JACK is running, that means no audio. Launch timidity as follows:

timidity -Oj -iAD

That should get you sound when JACK is running.