"Peter Larsen" wrote ...
A few seconds devoted to reading the original question
allows only the option of recording audio on a video
recorder as having been considered because of this,
so that was what I wrote about.

No. The original question says nothing about "video" in
any sense of the word. Go back and read it again.

The Subject clearly says "Audio Cassettes".
This is the rec.AUDIO.tech newsgroup.

If "Curious" were asking about VIDEO cassettes,
he/she would have surely responded to at least ONE
of the three different messages asking for clarification
of the question.

I believe that you have made an unwarranted assumption,
and that you have not explicitly stated the assumption to
"Curious", and that you are unintentionally misleading
him/her.