Most surround sound test media focuses on the two industry giants:

Ensure your 5.1 array is positioned correctly: three speakers in front and two behind/beside the listener.

For those without physical media, you can find Surround Sound Test Files on forums like Reddit that cover everything from AAC 5.1 to DTS-HD Master Audio. Reddit·r/movieshttps://www.reddit.com

Often favored by audiophiles, DTS typically offers higher bitrates than standard Dolby Digital, which can result in a richer, more detailed audio experience during testing. What to Expect on a Surround Test DVD

Use the test tone function on your receiver to ensure every speaker is emitting sound at the same volume from your primary seating position.

After using technical tones, play demo clips. High-action scenes from movies like Saving Private Ryan or Master and Commander are legendary for testing the limits of 5.1 systems.

These test the electrical frequency response of your receiver and speakers, ensuring your subwoofer crossover is set perfectly. How to Run a Professional Calibration