Your comment is analogous to a colorblind person telling everyone how overrated red and green are.
First, someone with "untrained" AP (I assume you mean no musical training) wouldn't be in a position where they'd be needing to transcribe a Bach chorale, would they? Any AP possessor with musical training--I am one--finds transcription trivially easy since there's only rhythm to figure out.
While it can be momentarily distracting when music doesn't match its normal key due to transposition or tuning issues, I can move past it without too much effort, although I am continually aware of the discrepancy. It's like the visual illusion where the ballerina can spin both clockwise and counterclockwise depending on your perspective.
The biggest benefit is being able to identify the key without having to do the initial hunt for the tonic by testing notes. This is very useful in an accompaniment situation.
First, someone with "untrained" AP (I assume you mean no musical training) wouldn't be in a position where they'd be needing to transcribe a Bach chorale, would they? Any AP possessor with musical training--I am one--finds transcription trivially easy since there's only rhythm to figure out.
While it can be momentarily distracting when music doesn't match its normal key due to transposition or tuning issues, I can move past it without too much effort, although I am continually aware of the discrepancy. It's like the visual illusion where the ballerina can spin both clockwise and counterclockwise depending on your perspective.
The biggest benefit is being able to identify the key without having to do the initial hunt for the tonic by testing notes. This is very useful in an accompaniment situation.