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IDProjectCategoryView StatusDate SubmittedLast Update
0010298ardourbugspublic2026-04-26 03:272026-05-18 06:45
Reporterbongobong Assigned To 
PrioritynormalSeverityminorReproducibilityalways
Status newResolutionopen 
PlatformDebian GNUOSLinuxOS Version(any)
Product Version9.2 
Summary0010298: MIDI learn with Charlatan virtual synth has erratic behaviour
DescriptionI can connect my MIDI controler (Behringer UMX250) with Ardour, then I can link with MIDI learn to Charlatan virual synth. But the “Frequency” knob of the Filters moves erratically. This behaviour doesn't appear in Carla (standalone) and Qtractor.
Steps To Reproduce- Load Charlatan synth (VST3)
- Map the "Filter1 Cutoff" with MIDI controller.
- When move the hardware the filters moves erratically
Additional InformationOS: Debian 13
Ardour: 9.2.3
Charlatan: 3.3.2 VST3
TagsMidi, VST3

Activities

bongobong

2026-04-26 03:27

reporter  

88ff86c289b036d7aa21295c74b058021800fe87_2_690x257.png (42,573 bytes)   
88ff86c289b036d7aa21295c74b058021800fe87_2_690x257.png (42,573 bytes)   

paul

2026-05-02 13:16

administrator   ~0030309

Ardour is not involved with MIDI Learn done via a plugin's own GUI, and we do not recommend using this approach either.

bongobong

2026-05-18 06:45

reporter   ~0030393

It's not a problem of MIDI learn. It is a problem related to MIDI linear or nonlinear mapping. Please read my new post: https://discourse.ardour.org/t/ardour-and-linear-or-nonlinear-logarithmic-instrument-parameters/113296

Issue History

Date Modified Username Field Change
2026-04-26 03:27 bongobong New Issue
2026-04-26 03:27 bongobong Tag Attached: Midi
2026-04-26 03:27 bongobong Tag Attached: VST3
2026-04-26 03:27 bongobong File Added: 88ff86c289b036d7aa21295c74b058021800fe87_2_690x257.png
2026-05-02 13:16 paul Note Added: 0030309
2026-05-18 06:45 bongobong Note Added: 0030393