I've been using my HR-24 500 with DD for years, no problems with my old Sherwood receiver. Now I have a new HR-24 200 and when I switched on the DD internally (and the Sherwood's red light came on correctly indicating DD) suddenly the volume even at "1" exploded and practically blew out my speakers. And this is true of all shows outputting DD. Did D* upgrade/modify the DD signal at some point rendering an old legacy DD decoder useless? Or did Dolby Labs change the formula for some reason rendering old legacy decoders obsolete? Do I simply need to buy a new updated receiver to deal with some new mystery undocumented DD encoding?