LMMS / LMMS/lmms

VST changes preset value on load

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#3,847 14 comments 0 reactions 0 assignees View on GitHub
vst
Dominant language
C++
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Description

i'm not sure if this bugs vst, vestige or sound core
when i open in windows my vst that is bound to hardware i hear very different sound, it's not the same as i hear in another DAW with ASIO support (not WDM or else).
i didn't mention if it asks me to save preset, if yes then it changes, i'll test it.
is there some kind of save latest config for vst? and if it tries to apply, then this can lead to a crash, because some values can be dynamically changed with using different synths + presets (+fx-fx)

the other way it can change, if it is reading midi and tries to send values somehow, while midi is not enabled for the channel

Contributor guide

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Research direction

No file or test is named. Start by reproducing the Windows case with the hardware-bound VST and compare LMMS with another DAW using ASIO, then investigate preset loading and MIDI handling as possible sources of changed values. Done means the cause is isolated and the VST retains the expected preset values without unintended MIDI changes or crashes.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
desktop
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
20/100

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