Mark DeBellis wrote:

OK but I am saying, suppose the meaningful variable is a property of
an extended passage. So you have to listen to an uninterrupted
passage in order to perceive the property. Switching back and forth
will defeat the purpose, yes?

I would say this is a false premise. But perhaps you could give an
example of a meaningful variable that is a property of a longer passage.

Gary Eickmeier