In article ,
Serge Auckland wrote:
Tape machines had to be aligned to 1dB on Dolby tracking if pumping was
not going to be audible, and the only way of doing that, was to get the
machine aligned to one formulation of tape, and stick to it.

I never bothered much with cassettes - but sticking to one brand and type
of pro open reel tape was no guarantee its sensitivity would be
consistent. For our multitracks we used to test every single tape when new
and mark them - then use them in a batch of the same sensititivily to
reduce line up time. We also used to recycle them for the same reason.

--
*If at first you don't succeed, then skydiving definitely isn't for you *

Dave Plowman London SW
To e-mail, change noise into sound.