I've begun using a pro trial on windows. in the player version, the middle mouse button in the visualiser toggled play/pause, but in the pro it doesn't and I can't find the function anywhere.
Also, My Asus zenbook supports a three finger tap on the track pad to toggle play on active media, which doesn't work for resonic as far as I can tell. This can be achieved with a universal hotkey but the option would be nice.