A little about RAab:
Singer, songwriter, producer, vocal coach and artist developer, Robert “RAab” Stevenson, has worked with some of the most famous voices and producers heard on urban and pop radio today. Among them are Justin Timberlake, Taylor Swift, Alicia Keys, Rihanna, Lionel Richie, Kelly Rowland, Lady Antebellum, 50 Cent, Jennifer Hudson and many others.
Isato did an Interview with him especially for you
In this video Robert “RAab” Stevenson gives a Vocal advise to Beatbox Tutorial.Net Students.