Tim Catlin formed the Overtone Ensemble in 2012 in order to perform works using his self-made "vibrissa" instruments. Each instrument consists of 12 vertically mounted aluminum rods that are longitudinally stroked by hand to produce ethereal singing tones. The long sustaining nature of the rods' sound and microtonal tunings allow players a sonic palette of complex textures and harmonic complexity. Other instruments used include massed hand-bells, quarter-tone bells, EBowed acoustic guitars, re-tuned glockenspiels, wine glasses, and long wire instruments. The ensemble's compositions use acoustic phenomena arising from microtonal tuning such as phasing, combination tones, and sympathetic vibrations, as well the effects of room resonance. All sounds are acoustic in origin without effects or sound processing. The results are works of shimmering intensity and pulsating beauty. The Overtone Ensemble consists of Tim Catlin, Atticus Bastow, Philip Brophy, and David Brown. Since forming in 2012 the group has been well-received at festivals such as Slow Music, NOW now, Sound Out, Light in Winter, and Liquid Architecture as well as various galleries and clubs within Australia. Group members have a long history of involvement in experimental music, sound art, and improvised music both within Australia and internationally.