I know almost nothing about Metheny but I support any rant against using someone else's recorded voice who is dead and cannot complain to sing or play along with -- Tony Bennett (who I have always loved) did it with Billie Holiday, and my estimation of him dropped 100%. Natalie Cole should be ashamed. It is a despicable form of necrophiliac vampirism and someone should stick KennyG.s instrument in a useful portion of his anatomy.
yours, Peter T.