Involve's encoder is QS-based. It's a tri-band encoder, so it's more precise with placements of sounds by frequencies. The Surround Master v.2 and 3 will show, on the back panel, what setting to use for the different systems. A recording, encoded with the Involve encoder, will sound excellent when played via QS, Dolby PL II, and to some extent, Dynaquad decoders.