On Tuesday, January 8, 2019 at 5:34:00 PM UTC-5, wrote:
John-Del:

On a lot of receivers/amps(esp. older ones),
'Tape Out' does mean 'coming from' the
tape/cassette deck, and 'Tape In' means
what is going out of the receiver/amp to
the record deck.

From my own experience.

You have those backwards. On the receiver, the tape in "comes from" the tape.

The tape out comes from the pre-amp section prior to the volume control.