To test or calibrate a system, you need a high-quality video that isolates each speaker channel: Front Left, Center, Front Right, Surround Right, Surround Left, and the Subwoofer (LFE). Recommended Sources for 5.1 Test Videos
Even with a "patched" file, your system might downmix to stereo. Use: dolby digital 51 surround sound test video download patched