Show/hide, and also switch audio streams you can with popup menu of
button.Also you can switch audio streams with "Ctrl + /" hotkey.
This window can be showed by
button and allows you to adjust sound of playing file."Allow internal audio-switcher" option specify whether Light Alloy will just switch audio streams and shift them relatively to video, or (if checked) additionally use equalizer, normalization and boost. Also, when checked, if you change playback speed rate sound tonal not changed.
Also, this window allows you:
Global sound options can be seen in Preferences \ Sound.
You can specify here volume change step in %, languages priority and similar settings, which actually set once and mostly never changes further.