At last - a Hi-Res version of Deep Purple's 1972 classic Machine Head, that really cooks. Waaaay superior to the older DVD-A release. HDtracks can be a bit of a lottery - I don't know how much say David Chesky (who runs HDtracks) has in how the product he sells is created from the original analog Master Tapes. I suspect a lot less than he would like. Chesky's own label proves beyond doubt that he knows a thing or two about good sound. But this is one release that can be safely purchased.