That's right, Fred; unless a sound was specifically intended to be located in the surround speaker, as occasionally is the case in movies or in a multi-channel music disc that has a performer located there, the surround sound should be relatively subtle general ambience that doesn't draw attention to itself. For example, in classical music there are very few compositions(e.g., the Berlioz Requiem)that have performers at the side or back of the listeners, but the reflected sounds that make up more than half of the sound for a listener at a typical distance come from directions other than the front. Using DPLII, etc. to extract this sound from the front channels in stereo material and send it to the surrounds makes the listening experience a little more realistic, but isn't intended to be all that apparent, and isn't, until it's suddenly switched back to straight stereo and the sound field collapses toward the front.
