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IDProjectCategoryView StatusLast Update
0010082ardourbugspublic2025-12-29 16:39
Reporterpiergi Assigned To 
PrioritynormalSeverityminorReproducibilityalways
Status newResolutionopen 
PlatformGNU/LinuxOSDebianOS Versiontesting
Product Version9.0-rc 
Summary0010082: Ramping the tempo after a BBT does not work / work weird
DescriptionSame bug as 0009690. Ramping the tempo marker on the BBT does not work at all. If you add a tempo change after the BBT sometimes works, sometimes it skips a beat, it is unreliable.

Ardour v9.0-rc2-13 2025-12-29.
Steps To Reproduce1. add a BBT marker on measure 2 of a new session
2. add a tempo marker after that (e.g. measure 3, 200 bpm)
3. right-click on the tempo marker of the BBT, choose "ramp to next"
4. the numbers change, the tempo does not (also an extra phantom tempo-line is visible after the second marker, see screenshot attached)
TagsNo tags attached.

Activities

piergi

2025-12-29 13:27

reporter  

GhostsonAcid

2025-12-29 14:17

reporter   ~0029633

I can confirm this.
Thanks for pointing it out.
(I've been stress-testing tempos/bars/BBTs the past day, but for some reason didn't check this! o__o)

Paul has been working on tempo-map stuff lately, and will probably continue to iron these out!

For the time being (if it's urgent), just ramp only to/from *non-BBT* tempos like so:

piergi

2025-12-29 16:30

reporter   ~0029634

Thank you.
1. it is not urgent—my first report was in summer 2024 ;-)
2. I am having wierd, not easily reproducible artefacts, in the configuration in your screenshot: moving the tempo markers sometimes leaves the markers in the middle of a bar, or between beats, also by editing them I got a "lost beat" (i.e. the metronome went 1, 2, 3, silence, 1, 2, 3, 4). Also the line of the fourth beat was missing.

I just tried now (screenshot attached): I placed the markers and the ramps, all good. After moving the markers one bar to the left, the first bar after the BBT (constant tempo) got this double-length 4th beat. (also the metronome is coherent and clicks every grid lines)
image.png (54,210 bytes)   
image.png (54,210 bytes)   

piergi

2025-12-29 16:39

reporter   ~0029635

It looks like after moving the markers a couple of times, they stabilise, somehow (not the one on the BBT, though). I'll do without BBT for the time being.

Issue History

Date Modified Username Field Change
2025-12-29 13:27 piergi New Issue
2025-12-29 13:27 piergi File Added: Screenshot From 2025-12-29 14-15-07.png
2025-12-29 14:17 GhostsonAcid Note Added: 0029633
2025-12-29 14:17 GhostsonAcid File Added: Screen Shot 2025-12-29 at 4.10.29 PM.png
2025-12-29 16:30 piergi Note Added: 0029634
2025-12-29 16:30 piergi File Added: image.png
2025-12-29 16:39 piergi Note Added: 0029635