Dear collective ARSC wisdom,
I'm looking for reference resources for the estimation of the time used on
*partially-full* open-reel audio tapes.
I'm aware of resources that calculate timings (based on various factors)
for *full* audio tape reels, such as:
But, I'm wondering if anyone might be able to point me towards a stable and
authoritative reference for similar calculations for *partially* full reels.
So, a sample problem would be:
What is the duration on a reel which is 7", 1.5 mil tape, recorded at 7.5
ips, and has a tape-pack diameter of 4.5 inches on the reel (assuming a
2.25 inch center hub)?
We have a working estimation method in place, for the project I'm current
working on, but I'd like to find an authoritative reference in the
community, that documents this.
If anyone knows of such a resource, I'd appreciate any info!
P.S. the engineers amongst you may scoff that this is simply math, but,
math is not my strongest suit, hence my search for a stable reference,
rather than back-of-the-napkin calculation - please don't judge too harshly
best regards, /Nick
Nick Patterson, Music Librarian
Music & Arts Library, Columbia University
701 Dodge, 2960 Broadway
New York, NY 10027