He has created music for several Rebecca Horn installations as well as composing scores for her films. He has taught at Universities throughout the world and gives yearly master classes in Greece specializing in modern applications of the teachings of Pythagoras. He curates the annual Plushmusic festival in Cologne, now in its 8th edition. In 2013 he released the 13 Box Set "13 Views of the Heart's Cargo" and received the German SWR Jazz Prize. In 2014 he released his second 13 CD set "Cusp of Oblivion". In 2017 he directed the Thessaloniki Jazz Festival and the Dortjol Festival in Belgrade. He is a passionate mountain runner and currently lives and works in Belgrade, Serbia. Hayden has been playing with zeitkratzer since 2006.
Hayden plays a Selmer Super Action Alto Sax serial number 30226 with Vandoren V16 Reeds strength 4 and a Vandoren 35 mouthpiece. His soprano is a Yanigisawa s880 with a Vandoren s35 mouthpiece and Vandoren V16 4 reeds. Hayden plays bagpipes made by McCullen Pipemakes and easydrone reeds on all three drones. His flute is a simple Yamaha with a uranium enriched head.