Esa Pietilä is a very versatile saxophone player working in the fields of contemporary chamber music, modern jazz and free improvised music. He has played around Europe, USA, Asia and collaborated with numerous jazz and impro players like Paal Nilssen-Love, Mark Helias, Christoph Baumann, Rauol Björkenheim, Mikko Innanen, Jaak Sooäär and many others.

Improtest is concert series that brings improvisational music from local and foreign authors to local audience. The concerts have been taking place since 2005 once a month.