LMMS / LMMS/lmms

Monitoring notes doesn't work after pressing 'record notes while playing' and then play in the piano roll

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bug
Dominant language
C++
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Avg merge
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Description

### Bug Summary

You will be unable to hear new notes being placed by the mouse.

#### Steps to reproduce

In the piano roll, press 'record notes while playing', and then 'play/pause' twice. (once for play, once for pause)

#### Expected behavior

Being able to hear notes as they are placed or highlighted.

#### Actual behavior

The instrument is not sent the notes which are being placed or highlighted.

#### Affected LMMS versions

1.2.2, Win x64 is the version I experienced the bug on.

#### Logs

Click to expand


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

Start by reproducing the issue in LMMS 1.2.2 using the piano roll: enable “record notes while playing,” play, pause, and place or highlight notes. Then trace the piano roll’s note-monitoring and playback state across those actions. Done means newly placed or highlighted notes are sent to the instrument and can be heard after the sequence.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
audio-video-rtc, desktop
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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