Click any speaker to test it
You
(listener)
Front Leftch 1
Front Rightch 2
Centerch 3
Subwooferch 4 (LFE)
Rear Leftch 5
Rear Rightch 6
Side Leftch 7
Side Rightch 8
Pick a layout, then click a speaker or use "Walk all channels". Each speaker lights up green while its tone is playing.