I would like to ask everyone here about the audio on the BD and region 2 DVDs of Zulu. The audio on those releases is 2.0 Dolby surround but the region 1 DVD is only mono. Is there a difference between the 2.0 surround mixes and the mono mix? Is the surround mix original? What has happened to the original 6-track stereo mix which was presented on the Criterion Laserdisc? Has it been lost?