|Robin Hayward (*1969) is a tuba player and composer who has introduced radical playing techniques to brass instruments, initially through the discovery of the «noise-valve» and later through the development of the first fully microtonal tuba in 2009. In 2012 he invented the «Hayward Tuning Vine», partly out of a desire to visualize the harmonic space implicit within the microtonal tuba, and began working on a solo tuba piece with Éliane Radigue, which became «Occam XI». The Hayward Tuning Vine provides an audiovisual map of the mathematical relationships that underly Just Intonation, thereby allowing intuitive and immediate interaction with them. The «noise-valve» changes the traditional pitch-altering function of the valve to a noise-producing function, allowing air to be trapped and redirected within the instruments and thereby changing the sound source from the player’s lips to the valve itself. Other composer collaborations include Christian Wolff and Alvin Lucier.