LMMS/lmms

force mute when exporting tracks to avoid automation unmuting an instrument

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#5,533 创建于 2020年6月11日

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 (9 评论) (0 反应) (1 负责人)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.

贡献者指南

技术栈
cpp
领域
desktop
议题类型
bug
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-2 days
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
mostly clear
前置要求
Understanding of LMMS automation systemFamiliarity with track export code
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
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.