Robertson is a full-time musician who splits his time between studio work and filling in on live dates. He says, "I do a lot of sound effects like airplanes and violin tones, car chases, little stuff like that." He uses a Korg Tone Works AX3000, Ibanez DE-7, Electro-Harmonix Pulsar, Modtone Stutterkill, Line 6 DL4, Boss TU-2, Biyang Phaser, and a Snarling Dog Bass Wah ("cause I like the lows"), all run through a Hughes & Kettner Redbox run straight into the soundboard or his amp rig.