LMMS / LMMS/lmms

force mute when exporting tracks to avoid automation unmuting an instrument

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#5,533 9 comments 0 reactions 1 assignee Claimed by @MrTopom View on GitHub
bug good first issue
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Description

#### 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](https://user-images.githubusercontent.com/12591074/94984060-0785dc80-0583-11eb-9044-a35959f34c3a.png)
#### 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.

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