In Culture Shock, Max was voiced by Andrew Chaikin (Replaced by William Kasten in later episodes).
Andrew Chaikin, in addition to his video game voice work, is also a notable vocalist and beatboxer, operating under the name Kid Beyond: http://en.wikipedia.org/wiki/Kid_Beyond
Andrew Chaikin is listed among the vocalists working at WaveGroup Sound, recording cover songs for the first Guitar Hero: http://www.mobygames.com/game/ps2/guitar-hero/credits
The two David Bowie covers which are downloadable content for Rock Band were also recorded at WaveGroup, and the vocalist for these songs? Kid Beyond! http://www.rockband.com/songs/heroes
Needless to say, that's awesome.