[AV Media Matters] cassette tape shelf life?

[Robert Brian Levy <xernaut@yahoo.com>]

Hello all,

This is from a friend working with another Oklahoma tribe.  Could any of
you guys give some answers to these questions about analog cassettes, about
whose shelf lives I do not know that much.  I'll forward on to him any
answers anyone could provide.
Thanks for the help.

             Brian Levy

forwarded message:

do you have any information on how long cassette tapes may survive before
becoming unplayable? or losing their fidelity?
i'm sure storage conditions would make a great deal of difference but do
you have any sense of this question?

Brian Levy
Kiwat Hasinay Foundation:
Preserving Caddo Heritage
211 W. Colorado Ave.
Anadarko, OK 73005  USA
(1) 405-247-5840
xernaut@bigfoot.com