Program crash when running audio items in a show

Michael Clements · Sat Nov 16, 2013 6:06 pm

Hi Massimo,

I built a show recently consisting of 3 scenes with lots of overlapping audio files of jungle sounds, rain, exotic birds etc. in qlc+ 4.4.1 so that 2 or 3 sound files were being replayed simultaneously and repeatedly for about half an hour. It worked perfectly.

Then I saw in the documentation that apparently this isn't possible! I tried to run the show with 4.5.1 - instant crash.

I started a new project, added one scene to a new show plus one audio item (used several different items)and there is still a crash as soon as the time line reaches the start of the audio item.

I also tried to replay an audio file with a VC button. This results in a crash as well.

I have qlc+ running on Ubuntu 12.04.

Massimo Callegari · Sat Nov 16, 2013 6:15 pm

Hi Michael, did you select a particular audio output device in the audio input/output panel ?
That's very broken on 4.5.x, you need to leave it all unchecked for now.

Michael Clements · Sat Nov 16, 2013 6:41 pm

There's nothing at all to select under the audio tab of the inputs/outputs panel on my computer. Qlc+ was using Rhythmbox to replay audio under 4.4.1.

Massimo Callegari · Sat Nov 16, 2013 6:46 pm

Uh ?
QLC+ uses ALSA in Linux. No external applications. If you have 'aplay' you can check from a command line by typing: 'aplay -l'
QLC+ should show something similar to that

Michael Clements · Sat Nov 16, 2013 7:57 pm

Well, I assumed it was Rhythmbox as it says Rhythmbox under the volume control. However, on closer examination .....!

'aplay -l' returned:

**** List of PLAYBACK Hardware devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC269VC Analog [ALC269VC Analogue]
Subdevices: 1/1
Subdevice#0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Sundevice #0: subdevice #0

'qlcplus -o' returns messages about ALSA lib conf.c (cannot open) and ALSA lib seq.c (unknown seq fault) - can type out the whole thing if it helps.