>i just figured out what you mean.
>the instrumental will be hitting one chord,
>and he'll add a vocal track that would normally be played in
>the instrumental part
>and execute that note with his voice.
>
>so it makes the entire chord sound different.
>a note that would normally be buried in the mix
>is brought more to the forefront with his vocals.


YESSS that's exactly it. Great description.
Agreed on the rest.