LMMS / LMMS/lmms

Muted tracks' activity indicator is out of sync with notes.

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  • #6000 by @enp2s0 — closed without merging
bug
Dominant language
C++
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Description

### Bug Summary
Muted tracks' activity indicator is out of sync with notes.

#### Steps to reproduce
Add instruments to B&B editor, make them play the same rhythm and mute some.

#### Expected behavior
Muted channels' activity indicators should stay unlit, or if they're now intended to light up, they should do it in sync with what is playing.

#### Actual behavior
Muted channels light up, later than unmuted channels. This happens in both B&B and Song editors and can be observed across the editors, too.

#### Screenshot
![eaLNeiH5VN](https://user-images.githubusercontent.com/6411463/116225564-aca01680-a75a-11eb-826c-fb73d665f975.gif)

#### Affected LMMS versions
Version 1.3.0-alpha.1.102+g89fc6c960 (win32/x86_64, Qt 5.9.8, GCC 7.3-win32 20180312).

Contributor guide

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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

Reproduce the timing issue in both the B&B and Song editors with muted instruments playing the same rhythm. Trace how the activity indicators respond to muted and unmuted channels; done when muted indicators remain unlit or light in sync with the corresponding playback.

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
Mostly clear
Newbie friendliness
30/100

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