Here’s a vid of a new piece for solo double bass (in Viennese tuning, no less!) by Heinz Holliger and written for Venezuelan bassist Edicson Ruiz. Talk about a wild piece!
Prelude e Fuga for Solo Doublebass in the Vienese Tuning written in 2010 for Edioson Ruiz
I checked this out through the International Society of Bassists E-Bass Line. You’re an ISB member, aren’t you? If not, join! Here’s the link.