Tape Loop Testing On A Preamp?

One simple way to check out a tape loop is to take one set of IC's and connect them to the tape in and tape out creating a simple loop. Then play a CD or whatever and hit the tape monitor switch. If it's working you will not hear anything - the music will keep on playing. If it goes quiet then most probably the switch is dead. Just a WAG.

"If it's working you will not hear anything - the music will keep on playing." Those are opposites, New. If the loop is working, Licorice will indeed hear something, since the music will continue playing.
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Jefferybehr, You are right. What can I say? I should have said 'if it is working you will not hear anything but the music playing'. OK?

I set up the loop between Tape 1 Play, and Record. I put on a source. Then, I selected Tape 1 record, and I could still hear music. Does that mean it is working? This preamp is confusing.