Delos made a Dolby Surround (original meaning) test CD:
delosmusic.com
It would be interesting to try these original DS format test signals
and see how the test signals are rerouted by the new DS decoder(s).
Kirk Bayne

Surround Spectacular!
An audiophile's dream collection assembled by Delos' acclaimed acoustical guru John Eargle and Stereo Review's David Ranada. Specially priced 2-disc set
It would be interesting to try these original DS format test signals
and see how the test signals are rerouted by the new DS decoder(s).
Kirk Bayne