A specific tone (often a voice saying "phase check") plays. If the speaker is in phase, the voice sounds centered and solid. If out of phase, the voice sounds thin, diffuse, or disappears.
A test will only sound good if the physical speakers are resting in their proper designated positions. Use the following industry-standard angles and heights based on your primary seating position: Ideal Angle Ideal Height Dead Center ( 0 raised to the composed with power Ear level (or angled slightly up/down toward ears) Front Left & Right 22 raised to the composed with power 30 raised to the composed with power to the left and right Side Surrounds 90 raised to the composed with power 110 raised to the composed with power to the sides feet above ear level to disperse atmospheric sound Rear Surrounds 135 raised to the composed with power 150 raised to the composed with power behind the listener Match the height of the side surrounds Front of the room or corner surround sound test 7.1
: Finally, the audio moves to the Rear Left and Rear Right speakers. This creates the "rear arc," making it feel like someone is walking behind you rather than just beside you. A specific tone (often a voice saying "phase check") plays
When you perform a , you are verifying that each of these eight channels is producing the correct frequency, at the correct volume, at the correct time. A test will only sound good if the
For the most accurate results, download lossless audio files (FLAC or WAV) containing discrete 7.1 channels. Look for the "Dolby Labs Demo Disc" (available on archive.org) or "The Digital Theater" test files.