Chesky's Ultimate DVD Surround Sampler and 5.1 Setup Disc has the advantage of having Dolby Digital and DVD-A setup tracks. If you can set your DVD player to audio or video, you'll be able to calibrate both signal paths. It has a stereo track as well. It doesn't have a "2.1" track (stereo and sub), but it's full range and your sub will be derived from your crossover settings.

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AIX has a similar disc.