Wikipedia
Quasimoto
Quasimoto (also known as Lord Quas or Quas) is the animated alter ego or side project of hip hop producer Madlib, from Oxnard, California. Quas is known for his high pitched voice, and sounds as if he has inhaled helium. Another notable characteristic is the interplay between Quas' voice and Madlib's voice. Quasimoto was conceived one day in the studio, when Madlib decided to rap to his own beats. Madlib didn't like the sound of his voice (his friends in Oxnard call him 'Barry White' in reference to his deep voice) so he decided to slow his recorder down, rap slowly, then speed the recording back up to produce Quasimoto's distinctive high pitched sound.