Actually, guys, all 5.1 (and up) formats are full-frequency range to all (other than LFE) channels. Also, the dynamic range is "supposed" to be equal.

The technical difference is that the DTS encoding compression is about 1/4 that of the DD encoding, but Dolby Labs insists that the difference is inaudible. The general concensus is that DTS should, in theory, have the edge because of this.

The blind comparison tests have been difficult, largely due to the different signal levels that are usually encountered. In other words, when the same movie is played in the two formats, the difference in loudness tends to make the louder soundtrack (usually DTS) sound "fuller".

My opinion is that I can't tell the difference, but I haven't made a serious comparison. I just enjoy what ever comes along.

Larry