What multichannel mixdown decks are being used for surround?
For DVD-V work, the defacto standard is still the Tascam DA-88 family (DA-98, PCM800, etc), although many authoring houses are beginning to accept AIFF or WAV files. For DVD-Audio, most AIFF or WAV files are used for masters, although some machines being used include the DA-98HR and the Genex Magneto Optical recorder. Some people are even mixing to 1 or 2″ eight track analog.