Only works once after restarting Ubuntu

[rajansaini691]

The first time I open Zyn, everything works properly. However, when I close it and open it again, it is completely silent. I was loading it with alsa, since it has never worked with jack. Here is the output:

[INFO] Nio::start()
Starting Audio: ALSA
unable to open pcm device: Device or resource busy
ERROR: The default audio output failed to open!
Starting MIDI: ALSA
MIDI Started
[INFO] exec-after-init
[INFO] startup OSC
[INFO] UI calbacks
[INFO] OSC replay
[INFO] auto_save setup
[INFO] NSM Stuff
[INFO] LASH Stuff
[INFO] Launching Zyn-Fusion...
[INFO] Main Loop...
[INFO:Zyn] setup_pugl()
[INFO:Zyn] zest_tick()
[INFO:Zyn] zest_open()
[INFO:Zyn] Found Assets at /opt/zyn-fusion/
[INFO:Zyn] Starting Zyn-Fusion
[INFO:Zyn] Thanks for supporting the developement of this project
[INFO:Zyn] Creating MRuby Interpreter...
[debug] parsing json file
[debug] json parsed succesfully
Time for a fast load is 1.318ms load(0.008) class(0.001) spawn(1.309)...
making reverse graph[1091]<1.905 ms>
[INFO:Zyn] zest_setup()
[DEBUG:Zyn] setting up animation fps

This is running on Ubuntu 18.04 by the way. Let me know if you need more information, thanks!

[fundamental]

That sounds like a process is holding ownership for the audio device. You should be able to see the process in question via 'lsof /dev/snd/pc*'