Test your speakers and fix the 5.1 speaker order

Test each speaker

1. 1Open the Sound page and scroll to Surround 5.1 (the upmix needs to be on, with 6 channels detected).
2. 2Click Test speakers. A short hiss plays from Front Left, Center, Front Right, Surround Right, Surround Left and the Subwoofer in turn, and the button shows which one is playing.
3. 3To test one speaker, click it in the room diagram (FL, C, FR, SUB, SL, SR).

If the sound comes from the wrong speaker

HDMI devices don’t all number their channels the same way. Paatu Cassette reads the layout macOS reports, but some devices report it wrongly, which usually swaps the centre speaker and the subwoofer.

1. 1Under the diagram, open Speaker order.
2. 2It’s normally Automatic (the order macOS reports). Choose the other order: L R C Sub SL SR or L R Sub C SL SR.
3. 3Run Test speakers again. When every speaker matches, you’re done. The choice is remembered.