Marzuki Grinage is now a Certified Instructor of the Legendary Speech Level Singing Technique and is currently the only Certified SLS teacher in Oakland, CA. Speech Level Singing is applicable to Pop, R&B, Jazz, Rock, Opera, everyday speech, and more. SLS is used by singers such as Stevie Wonder, Prince, Luther Vandross, Ozzy Osbourne, Kelly Clarkson, Tamia, Anita Baker, Ray Charles, Julio Iglesias, Josh Groban, among many others. For more on Speech Level Singing please visit; http://www.speehlevelsinging.com 