LMMS/lmms

force mute when exporting tracks to avoid automation unmuting an instrument

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#5,533 建立於 2020年6月11日

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 (9 留言) (0 反應) (1 負責人)C++ (7,132 star) (961 fork)batch import
buggood first issue

描述

Bug Summary

When exporting tracks, all instruments except for the active one get muted. So far soo good. When I put a automation line that mutes and unmutes instruments to create a stutter effect, it gets activated by the automation line when another instrument is active. I found a workaround, which consists of the automation line muting a FX channel that is linked to the instrument.

Steps to reproduce

Open a project with several instruments, and create a automation line that mutes and unmutes an instrument. Then export tracks. Voliá there you go.

Expected behavior

The currently inactive instrument stays muted

Actual behavior

The currently inactive instrument gets unmuted

Screenshot

lmmsbug

Affected LMMS versions

I tested it in Version 1.2.1 (Linux/x86_64, Qt 5.12.8, GCC 9.3.0), but I suspect all versions where 'export tracks' exists are affected.

貢獻者指南

技術棧
cpp
領域
desktop
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-2 days
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
mostly clear
前置要求
Understanding of LMMS automation systemFamiliarity with track export code
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
20
研究方向
The issue describes a bug where automation unmutes instruments during track export. Investigate the export tracks functionality, likely in src/core/ExportProject.cpp or similar. Look for how muting is applied before export and how automation overrides it. The automation system in AutomationPattern.cpp may need modification to respect forced mute during export. Review comments on the issue for any additional hints or attempted fixes.