"Triffid" wrote
It's de-emphasis. Tape a CD onto it and it'll sound just fine. Bet you
can't hear much past 14k anyway, I certainly can't. (44yo). Despite years
of under-rating by snide old farts, cassettes continue to provide a
worthwhile music source.

Worthwhile for decorators with their paint-bespattered cassette/radio
boxes that get hauled from job to job, providing background music while
they paint and plaster at exhorbitant rates and **** in their
employers' wives' sinks; yes, I'm sure.

I'm not talking Nakamichis here; I'm talking portable music
reproduction devices.

Cassette devices confirming to such constraints have inadequate
treble, even to my 33-years-old ears.