Okay, here's something simple I was shown many years ago by a teacher that I've got tons of embarassment free mileage out of over the years. It's an easy grip for a dom7alt that works especially well on a V7b9 sort of situation like we have in Ipanema. Because of the 7b9's close ties with a dim structure you can slide this grip up and down like a dim chord in intervals of a m3 although at times it will include unaltered notes like the .13'. So in Ipanema I do this at the end of the B section Am7 | D7b9 | Gm7 | C7b9 (I know for sure this is basic stuff for many of you) 5x555x x5454x x3444x x6777x 3x333x x3232x x1222x x4555x x8555x And you could keep going up in m3's until you run out of fretboard with this grip but to my ear, like dim chords it's best not to overdo it. I like the sound of it.