LMMS / LMMS/lmms

Envelope + (Rapidly) varying tempo give undesirable output.

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bug
Dominant language
C++
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Description

TempoNaN.mmp.zip

The tempo model is connected to a LFO controller. Instruments with envelope sounds weird, some notes may be skipped.
Edit: some notes may be skipped regardless of the envelope's status.
If arpeggio is enabled, it sounds more glitchy. Infs and/or NaNs are also generated.

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First steps

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the attached TempoNaN.mmp.zip and reproduce the issue using a tempo model connected to an LFO controller, with envelope and arpeggio variations. Trace the tempo and note-processing entry points while checking for skipped notes and generated Infs or NaNs. Done means rapidly varying tempo produces stable, valid output in all described configurations.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
audio-video-rtc
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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