The UK-based Chemical Expansion League of Adam Bohman (prepared strings, voice), Adrian Northover (sax, theremin, wasp synth), Sue Lynch (sax, clarinet, flute), and Ulf Mengersen (bowed & prepared double bass) present thirteen mostly succinct and eccentric improvisations that oscillate between sanity and absurdity, punctuated by industrial elements, bent tones, and surreal soundscapes.

Legendary Greek bass clarinetist and improviser Floros Floridis, also performing on clarinet, and German double bassist Ulf Mengersen of the Berlin Improvisers Orchestra and Ensemble MIA, meet the ever-creative duo of violist Ernesto Rodrigues and cellist Guilherme Rodrigues for this 6-part active studio improvisation whose title aptly translates to "Unexpected Encounters".

Eight aquatic themed works from the Berlin-based quintet of Hui-Chun Lin and Uygur Vural on cello, Matthias Müller on trombone, Klaus Kurvers and Ulf Mengersen on bass; also known as Ensemble Discoveries, this album collects work from 2020-22, described as "improvised music and Echtzeit Compositions and the ideas of deep sea, their special living conditions: big pressure, eternity darkness".

This string and reed quintet presents a fluid approach to chamber-oriented improv with dexterous melodic and harmonic motion, utilizing contemporary and jazz idioms as they create something masterfully unique; from Anna Kaluza on alto sax, Edith Steyer on alto sax & clarinet, Ernesto Rodrigues on viola, Guilherme Rodrigues on cello and Ulf Mengersen on double bass.

Some of the London free improv scene's finest players, including members of Remote Viewers, Custodians Of The Realm, London Improvisers Orchestra, The Runcible Quintet, &c, met with visiting Berlin double bassist Ulf Mengersen to record this fascinating collective improvisation, using objects, preparations, and a WASP synthesizer for wonderfully unusual results.

Four strings, voice and trombone make up the multinational collective quintet of Davide Piersanti (trombone), Hui-Chun Lin (cello and voice), Sergio Andres Castrillon Arcila (cello), Ulf Mengersen (bass), and Klaus Kurvers (bass) who are captured live at "t-berlin" in 2016 for a set of inventive and active cooperative conversations named for Greek letters.