Thank you and will do. Also don't think its in those cables after some more thinking.
I would have constant crackling ( and an unstable pc as you said) if that was the problem, and only have an issue exporting this track.
Also tried changing the setting from sdl to alsa. That changed as expected nothing.
(on most linux distro's ALSA is used anyway, also with LMMS set to sdl, that why I was not expecting it would change anything)
Tried to delete all plugins ( reverb, compressor, eq 's, bass booster, not the problem,
You mention VST. I should try to delete the bassline and or use something instead of the current vst for the bassline, (after saving under a different name )
The bass line is played by a base guitar vst, I never used before.........
I will be very disappointed if that vst is causing it, but unless I have an hardware issue , its now on top of the list of suspects.
Om Bass 2
http://www.vst4free.com/free_vst.php?id=2493
Will be very happy too, if it means I found the problem