Trey Gunn has toured and/or recorded with artists like King Crimson which he joined in 1994 (he is featured on seventeen Crimson albums), David Sylvian, Brian Eno, TOOL, Led Zeppelin’s John Paul Jones, Maynard J. Keenan’s “Pusicfer,” Vernon Reid, Azam Ali, Michael Brook and Robert Fripp. Gunn's predominant instrument, the Warr Guitar (which he refers to as The Beast), is the world’s most advanced “touch” guitar. It combines bass and melodic strings on a single broad fretboard to provide the sonic range of a piano. He is the instrument’s most prominent artist and advocate.