My understanding of the DTS formats is as follows: DTS ES 6.1: For source material encoded for DTS ES 6.1 (a discrete 6 channel format)? DTS ES matrix 6.1: takes 5.1 source material and converts it to 6.1? DTS NEO:6: converts analog material to 6.1 format? Questions: 1. does the source have to be DTS 5.1 compatible for Matrix 6.1 to work? 2. Is NEO:6 a reasonable alternative to PLII? Will it work with only 5.1 speakers? 3. [unrelated] What does SHARC stand for?