The "fullest" use of your system with most music is often going to be in STEREO, not dd/dts. DD/DTS music is relatively dead. You can check around for Blu-ray audio discs, which will generally have DTS HD-MA or DD TrueHD tracks on them, but those are semi-rare too. Concert discs are possibly your best bet. So chances of finding a particular song, especially pop, in multichannel is not always likely.