I use the ctrl+alt+a hotkey to toggle mute, but it only works in the app. I'd like a system-wide hotkey to do this so I don't have to switch to it to toggle mute. I mapped ctrl+alt+a to a mouse button so if I could hit that mouse button from anywhere it would be very convenient.
While I'm on hotkeys:
Hotkeys should be customizeable. I should be able to set toggle mute to anything I want