Another wrinkle: Some recordings are being re-released as music DVDs that
are encoded for DTS playback (e.g. Steely Dan "Gaucho" and "Aja"). You can
playback these discs on any DVD player that supports DTS (most offer this
capability in addition to Dolby Digital). These CD releases are designed to
enhance the listening experience (cf. limitations mentioned in my last
memo) *but* to hear the improvement you must have an amplifier that is
designed for DTS playback (many Dolby Digital amps also).
*So* if you shop for a disc and see "DTS" as part of the description,
you'll know what you're getting.
These releases remind me of the quadrophonic experiments of the 1970s.