TubeAmps crashes Ardour when looping

[BrunoVernay]

Loopings are dangerous indeed. I consistently crashes Ardour when using TubeAmp and looping a region in Ardour. It crashes at the end of the region, when it is supposed to go back at the beginning of the loop. It does not crashes if there is no loop or if I bypass TubeAmp.

• Could not find the plugin version (?)
• Ardour 6.3.0 "Hybrid" (rev 6.3) Intel 64-bit
• Linux Fedora 32

[olegkapitonov]

Thank you for reporting this!

I will try to reproduce this problem in latest Ardour 6.5.

[SkyAlexV]

I have the same issue, but my ardour (6.5.0) crashes when trying play loop only if i have MIDI track.

[ntonnaett]

With official 6.6 builds it doesn't crash but makes a horrible noise. Fedora 34 builds crash.

[Schroedingberg]

I have similar issues. For today, that means I will try to resort to different plugins for my guitar distortion needs. I will not abandon this one though, since I really like its simplicity. Unfortunately, my technical skills in the signal processing domain are not sufficient to be able to help a lot, but if there is anything I can do that I am overlooking, please let me know.

[agittins]

@olegkapitonov I am not sure if this is relevant (or if I've mentioned it before) but I remember there being a problem for some plugins in Ardour when looping that were caused by the plugin not expecting to receive partial buffers (ie, at the loop point, I think Ardour sends a shorter audio buffer, while most plugins assume to always receive the same sized buffer each time). It might be an idea for investigation if you have trouble reproducing.

[olegkapitonov]

@agittins I have this issues too now, looping causes horrible noise and then crash of Ardour. I think that partial buffers very likely can cause this. I will investigate this in the coming days.

[saberking]

Looping in Ardour has never worked properly for me, I am pretty sure that the problem is Ardour itself.