The sound does not mute when the user imports a sound, play the timeline, disable sound clicking the sound button on the play controls, play the timeline, reenable the sound, and disable it again.
1. Run v0.5 latest beta build.
2. Import a sound track.
3. Play the timeline.
4. Disable the sound by selecting the sound button on the play menu.
5. While playing the timeline reenable the sound again using the same method.
6. Disable the sound the same way while the timeline is still playing.
7. Observe the screen.
The sound continues to play.
I expected the sound to mute when disabled.
This also occurs the same way if the user disables sound layers.