I don't have much use for synthesized DSP music modes either, but some basic user-controlled DSP funcionality is important for those of us who listen to acoustic music recorded in a live environment and want to approximate a concert hall experience. To do that from a two-channel recording, you must be able to control the delay and high frequency contouring of the surrounds, not just the volume. More delay: bigger hall; bigger hall: more high frequency rolloff required. Read Lexicon's white papers on the subject.