What's A Mix Tape?

These MAXELL Metal MX-90 cassette tapes used to be the top of the line back in the 80s.
[I have many in my archives.]

Remember, you had to flip the bias setting on the deck and choose either NORMAL, CRO2 (CHROMIUM DIOXIDE) or METAL.

Now you can't find a kid who even knows a what a cassette is.