So, if they want to play a concert Bb scale, they start on a C (they have to think up a whole step). Concert C is their D, Concert Ab is their Bb. Alto and baritone saxes, alto clarinet and most alto horns are Eb instruments: when they play a C it sounds like a Eb on the piano.
In addition to his feature film credits, Diaz is well-known for his many seasons on Showtime's award-winning series Weeds, where he plays the role of Guillermo, as well as his comedic performances on Chappelle's Show for Comedy Central.
He is also known for his role of Jake Sanders in the Jerry Bruckheimer television series Hostages on CBS and the role of Stevie Botwin at the age of 13 in the series finale, of the critically acclaimed comedy-drama series Weeds on Showtime.