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IDProjectCategoryView StatusLast Update
0010183ardourbugspublic2026-02-20 20:55
ReporterGhostsonAcid Assigned To 
PrioritynormalSeveritymajorReproducibilityalways
Status feedbackResolutionreopened 
PlatformmacOSOSMojaveOS Version10.14.6
Product Version9.0 
Summary0010183: Adding, bypassing, or unbypassing plugins with delay whilst playing (also) causes shifting audio...
DescriptionHello again!
...

Sorry for spamming you guys with 2min videos (-___-), but here's another one because I think this is important:
https://odysee.com/@icterine:a/Ardour-9---Adding,-Bypassing,-or-Unbypassing-Plugins-with-Delay-whilst-Playing-causes-Shifting-Audio:2

--> Also possibly related to issue 0010177:
https://tracker.ardour.org/view.php?id=10177

I personally would expect that PDC would be properly 'reset' or 'accounted for' *whilst* the playhead is rolling.
But if this is some necessary or unavoidable artifact from how PDC is handled in Ardour, then I guess so be it!

Thanks for watching/reading!
-J

TagsPDC, phasing issue, plugin delay compensation

Activities

GhostsonAcid

2026-02-20 20:29

reporter   ~0029956

Seems to (also) be fixed as of v9.0.110!
This commit: https://github.com/Ardour/ardour/commit/9882cf0302dc97233ed0088b1796cb5653b9afdb

~Thanks, Robin!

GhostsonAcid

2026-02-20 20:55

reporter   ~0029962

-Solved for merely *playing* audio (i.e. pressing play, or using the spacebar).
-But NOT yet solved for *looping* audio.

...
@x42 You mentioned that this ('shifting' audio stuff) has to do with *reading* the file(s) from disk, yeah?
-So does *looping* audio handle disk reading differently somehow?

Issue History

Date Modified Username Field Change
2026-02-13 14:41 GhostsonAcid New Issue
2026-02-13 14:41 GhostsonAcid Tag Attached: PDC
2026-02-13 14:41 GhostsonAcid Tag Attached: phasing issue
2026-02-13 14:41 GhostsonAcid Tag Attached: plugin delay compensation
2026-02-20 20:29 GhostsonAcid Status new => closed
2026-02-20 20:29 GhostsonAcid Resolution open => fixed
2026-02-20 20:29 GhostsonAcid Note Added: 0029956
2026-02-20 20:55 GhostsonAcid Status closed => feedback
2026-02-20 20:55 GhostsonAcid Resolution fixed => reopened
2026-02-20 20:55 GhostsonAcid Note Added: 0029962