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IDProjectCategoryView StatusDate SubmittedLast Update
0010136ardourbugspublic2026-01-25 11:582026-01-25 12:08
Reportersongo Assigned To 
PrioritynormalSeverityminorReproducibilityalways
Status newResolutionopen 
PlatformDebian GNUOSLinuxOS Version(any)
Product Version9.0-rc 
Summary0010136: Pianoroll editing stops working after certain region manipulations
DescriptionAfter splitting and moving a longer MIDI region, the pianoroll shows glitches when zooming with the mouse wheel. Notes then start to disappear, making it impossible to edit the region in the separate window or in the properties box.
Steps To Reproduce1. Create a new session.
2. Create a fairly long MIDI region (about 1 minute or so).
3. Draw some notes in the last few bars (as shown in ar-screenshot01.png).
4. Note that at this point, zooming with the mouse wheel in the properties box becomes problematic due to unpredictable horizontal scrolling.
5. Split the region just before the first notes, delete the empty region, and move the region with notes to the beginning of the session (as shown in ar-screenshot02.png).
6. After some zooming with the mouse wheel – both in the separate pianoroll and in the pianoroll within the properties box – glitches start to appear: the grid and notes disappear, making editing in the pianoroll impossible (the attached animation shows the problem).
TagsNo tags attached.

Activities

songo

2026-01-25 11:59

reporter   ~0029763

ar-screenshot01.png (103,784 bytes)   
ar-screenshot01.png (103,784 bytes)   

songo

2026-01-25 12:00

reporter   ~0029764

ar-screenshot02.png (93,708 bytes)   
ar-screenshot02.png (93,708 bytes)   

songo

2026-01-25 12:08

reporter   ~0029765

Couldn't upload the animation. See it here:
https://oc.lh2.pl/s/yFXTB9S9c2F3H53

Issue History

Date Modified Username Field Change
2026-01-25 11:58 songo New Issue
2026-01-25 11:59 songo Note Added: 0029763
2026-01-25 11:59 songo File Added: ar-screenshot01.png
2026-01-25 12:00 songo Note Added: 0029764
2026-01-25 12:00 songo File Added: ar-screenshot02.png
2026-01-25 12:08 songo Note Added: 0029765