LMMS / LMMS/lmms

Notes Stacking When Using Sustain Pedal

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#6,941 2 comments 1 reaction 0 assignees View on GitHub

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bug core
Dominant language
C++
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Avg merge
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Merged PRs (30d)
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Description

When holding the sustain pedal on a keyboard, pressing the same note twice will cause them to play in unison. Pressing them repeatedly creates unbearably loud noise.

On other programs, or at least on my piano keyboard when playing it with sound, playing the same note twice while the sustain pedal is pressed down stops the preexisting note. One key should only be making one sound.

This occurs on Linux on the following versions:
Version 1.3.0-alpha.1.437+g476a56e71
Version 1.2.2

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

No file, test, or entry point is named. Start by reproducing the sustain-pedal behavior on Linux with the listed LMMS versions, then trace MIDI note handling for repeated notes while sustain is held. Done means repeated presses of one key do not stack simultaneous sounds and the behavior is verified against the reported case.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp, linux
Domain
audio-video-rtc, operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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