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IDProjectCategoryView StatusLast Update
0009533ardourbugspublic2023-11-18 22:56
Reportererdavis7 Assigned Topaul  
Status assignedResolutionopen 
PlatformApple MacintoshOSMacOSOS Version10.12 or later
Product Version8.1 
Summary0009533: Automation Inconsistency
DescriptionIn the attached file, the pitchbend is set at neutral for bars 1-2, and then set to maximum for bars 3-4. When played from the beginning, it sounds as expected. However, if after playing past measure 3, playback is resumed at measure 2, then measure 2 will sound with the pitchbend at maximum (the last value that was played), rather than at neutral (the last value that was set in the timeline).

Whenever resuming playback, automatable parameters ought to be set either to the last value that was set in the timeline, or to neutral if there was no previous setting in the timeline.



2023-11-11 20:34



2023-11-14 19:39

administrator   ~0028331

does this still happen if you set the automation style for pitchbend as "interpolated" ?


2023-11-15 02:40

reporter   ~0028332

It happens in both "Discrete" and "Linear" modes.


2023-11-18 22:06

reporter   ~0028338

This is a manifestation of a more general phenomenon (which could justifiably be seen as a problem): Ardour plays MIDI sequentially and doesn't in general try to restore the track state to what it would have been if it had played from the start. If there are patch changes in a track, for example, this can lead to the wrong "instrument" being played. (I haven't checked if the same problem arises with all CC messages, but if it doesn't, that would be a (welcome) inconsistency.)


2023-11-18 22:56

administrator   ~0028340

we actually have the internal "technology" to do the "catch up with current total MIDI state" now.

the actual problem is deciding when to emit any MIDI messages. for example, in the specific case of this bug, doing it on completion of a locate is potentially wasteful, because the user may just locate again. they may also edit the information that is earlier than the current playhead position, which will make the MIDI sent be inaccurate. that would suggest doing it just before we start rolling (playing), but it can be tricky to ensure the ordering of messages is 100% accurate.

still thinking.

Issue History

Date Modified Username Field Change
2023-11-11 20:34 erdavis7 New Issue
2023-11-11 20:34 erdavis7 File Added:
2023-11-11 20:34 erdavis7 Tag Attached: automation
2023-11-14 19:39 paul Assigned To => paul
2023-11-14 19:39 paul Status new => feedback
2023-11-14 19:39 paul Note Added: 0028331
2023-11-15 02:40 erdavis7 Note Added: 0028332
2023-11-15 02:40 erdavis7 Status feedback => assigned
2023-11-18 22:06 DonJaime Note Added: 0028338
2023-11-18 22:56 paul Note Added: 0028340