The Duo ad lib. results from the artistic exchange between Andreas Staffel and Julius Holtz in which two different artistic personalities and attitudes meet each other.

Together both composers perform self originated pieces that are written for the very personal analog electronics setup of Holtz and include inside piano and preparation technics that have been developed by Andreas Staffel.

Staffel studied piano at the conservatory Frankfurt a. M., within the masterclass of Prof. Oleg Maisenberg and composition at the conservatory Stuttgart with Bojidar Dimov. His work ranges from solo pieces and chamber music to big orchestra pieces and opera.

Holtz grew up as a musician in the context of subcultural electronic music and studied within the Sound Studies program of UDK Berlin. He works in the field of improvised electronics, performance, multichannel concrete sound-compositions and installation.

For the project a:toc Holtz works with electronic material of different form and origin and processes the piano sound of the compositions of Andreas F. Staffel.
The compositions of Staffel work with subtle interlaced and contrasting tempers which initiate rooms that are filtered and supplemented by electronics.