[quote="Markymark" pid="991365"]
... The old Quad VTR format had dreadful quality audio, and I'm not sure it even supported stereo ? ...
I think maybe a little bit 'cruel' on the Quad format? Consulting my copy of 'Ennis' - the 'Bible' off quad engineers of the time! he states that Quad has a frequency response of 50z - 15khz although I don't have the noise figures to hand and to be honest I'm too lazy to look! So that bandwidth is what was required for mono FM broadcasting at the time. Given that most of us were still listening to 1/4" tape or audio cassettes I think Quad held up quite well. The second audio track, the 'cue track' has a much inferior performance but it was never intended to be for broadcast use as I'm sure you know.
I believe Ampex flirted with two broadcast quality linear stereo tracks on their AVR3 machines, but I can't give you a definitive answer. I don't believe it was widely taken up as of course 1" was taking over. 1" of course did have 4 broadcast quality linear audio tracks but no separate cue track. As a result one of those tracks was usually dedicated to linear timecode duties (A3 or A4 I can't remember now) and so laying off stereo became impossible. As I think Noggin posted earlier Bel Boxes came into day to day use for the laying off of audio in
VT edit suites, sometimes a quarter inch controlled by a Q-Lock box. Dolby was making its mark on 1" machines although I don't think it was an interchange standard within ITV so you had to be little bit careful where it was used if you were sending tapes around (I may be wrong on that - but as I recall quite a few machines had external Dolby units fitted to the VT's as it was not a standard 1" spec or fitment?)