German cellist and pianist living in Lisbon, Ulrich Mitzlaff recorded these two solo works titled "transparent — fluorescent sound fibers" #1 & #2 in 2015 and 2020, each voiced for extended and unusual instrumental technique in an interaction with percussive objects, the first from 2015 performing on cello, the second from 2020 performed on piano.

The Portuguese String Theory ensemble led by violist Ernesto Rodridgues explores the element "Tin" in this live performance at CreativeFest XIII at O'Culto da Ajuda, in Lisbon, 2019, leading a 10-piece ensemble of strings — violin & violas, cellos, double basses, guitars and piano — through an extended improvisation of remarkably detailed yet controlled interaction.

The Portuguese large improvising ensemble String Theory is heard live during the CreativeFest#12, at O'Culto da Ajuda, in Lisbon, Portugal in 2018, in an extended improvisation of incredible layering and restraint, making an amalgam of mostly acoustic string sources sound electronic and hallucinatory, an incredible achievement in string sonics.

Using Edvard Munch's famous painting "The Scream" as his muse, German cellist living in Portugal, Ulrich Mitzlaff, presents 10 acoustic miniatures from just over a minute to 4 1/2 minutes in length, including wildly interactive moments of delirium to darkly melodic bowed passages, using his impressive technique to create vivid depictions of Munch's work.

This supergroup of strings--16 musicians on violins, viola, cellos, double basses, piano, psaltery, zither, and guitar--in an intensely restrained collective improvisation recorded live at O'Culto da Ajuda, Lisbon, Portugal in 2017, as String Theory's 4th album continues their title themes from the physical universe named here for the rare metalloid "Tellurium".

The unusual cello duo format is explored by Mitzlaff and Mira in these experimental contemporary improvisations using acoustics and techniques mimicking live electronics to create a uniquely informed music.