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rncbc / qtractor

Qtractor - An Audio/MIDI multi-track sequencer
https://qtractor.org
GNU General Public License v2.0
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Silders in various LV2 plugins jitter while they are dragged with the mouse pointer #346

Closed maxigaz closed 2 years ago

maxigaz commented 2 years ago

Here's a screencast I recorded while moving a slider from side to side in the native UI of Surge XT (LV2), when loaded in Qtractor:

https://user-images.githubusercontent.com/10419911/172236101-87802890-0900-4988-9af2-7b195ef7197a.mp4

It also happens in the LV2 version of Vitalium and Odin2, but not the VST versions.

Also, I've never experienced this issue in Ardour and Carla.

windowsrefund commented 2 years ago

I use the lv2 version of Odin2 and have never seen this.

maxigaz commented 2 years ago

Here's a screencast of Odin2:

https://user-images.githubusercontent.com/10419911/172351489-3ece1694-266d-4369-842f-b56f484b991c.mp4

The behaviour on the knobs themselves is less noticable, but if you watch the recording in full screen, it also becomes apparent.

windowsrefund commented 2 years ago

I'll post my exact version tonight when I'm on the other side of this KVM. What happens if you take Qtractor out of the mix and just run the LV2 from Carla? In fact, that's exactly what I do anyway which may explain why I don't see this behavior?

maxigaz commented 2 years ago

It's butter smooth in Carla.

By the way, the version of Qtractor I have is 0.9.26.34git.676c3f (compiled from master).

windowsrefund commented 2 years ago

OK, looks like the issue is qtractor specific as I was just able to reproduce it myself. As mentioned earlier though, I've never seen this because I outsource all of my synths/etc to Carla by way of busses.

dpkg -l |grep qtractor
ii  qtractor                                                    0.9.26.34git.676c3f-69.1
rncbc commented 2 years ago

not sure if it fixes or makes it worse please test qtractor >= 0.9.26.36git.30bd72 watch out for any illusive side-effects esp.re.undo and redo and everything else (applies to LV2 UIs plugins only;)) byee

maxigaz commented 2 years ago

I've switched to Ardour as my main DAW/sequencer, so I've only tested it briefly.

All I can say for now is that I can still reproduce the original issue in Surge XT.

rncbc commented 2 years ago

what about qtractor >= 0.9.26.37git.749d91 ?

windowsrefund commented 2 years ago

I'd be happy to test once 0.9.26.37 is in the repo. I just upgraded to .36 and still see the issue.

maxigaz commented 2 years ago

what about qtractor >= 0.9.26.37git.749d91 ?

It looks like you fixed it this time. :) Thank you!