This track is built up with sounds from a setup with two oscillators and a rungler (just google it) in a feedback loop. Read more about this on jvkr.nl

Eight • 2013

This material—originally two tracks, mixed together for this occasion—was made in 2009 for a dance piece in Frankfurt by my friend and choreographer Ted Stoffer. The piece never happened, but much of the material made it in the performance Under Erasure, in which I played it live. http://www.jvkr.nl/oldsite/Recent/Entries/2010/3/23_Rome_•_Under_Erasure.html

Double Frankfurter with Feedback • 2009

This is one out of three improvisations of the morphantomistic event on 2nd May 2014. This recording is a performance by Kacper Ziemianin, Jeyong Jung and myself.

morphantomistic.kz.jj.jvkr • 2014

This work came about following Koenig's instructions in his 1960's Bithoven course, with sine wave, noise generator, filter, ringmodulator and reverb. I've uploaded it to celebrate 50 years of Sonology. Read what Koenig has to say about 25 years of Sonology: http://www.koenigproject.nl/Albumblaetter.pdf

Canine • 2009

The twelfth track of Ricardo Arias' CD Spontaneous Combustion, a collection of very short pieces, from 1996. It was my second year of my studies at Sonology, and had just discovered how to do live sampling in Kyma. Ricardo plays balloons, I control the Capybara with a glove.

SpontaneousCombustion#12 • 1996

The unedited recording of an improvisation with Marie Guilleray and Johan van Kreij at the Zuiderstrandtheater 24.10 of 2014.

Après La Mer • 2014

In March 2004 Duo Blam did an extended improv, of which this is a small selection. Cesar Villavicencio (www.cevill.com) on E-recorder, me using some sampling software of my own design. Not sure when the duo plays again.

Blam in Six • 2004

This piece is inspired by the work of David Tudor in the field of neural net synthesis. For it, I constructed a neural environment of which the sound qualities are explored. I also used the Elektrosluch (zvukolom.org/instruments/elektrosluch/) to set up feedback as an instrument. It is recorded in three takes, without any major editing.

Zeskva • 2015

Some tentatively organized output of a chaotic feedback process that attempts to bind simple design and complex result. Working towards a live set based on this.

Chaotic Oscillations Teaser • 2015

Mári Mákó - Dual Cassette Deck
Justin Bennett - VCS3 Synthi
Johan van Kreij - Various DSP
Recorded 1 September 2015

ImprovMJJ • 2015

A live performance compressed into 5 minutes. The instrument built for it is inspired on David Tudor's neural synthesis works.

Feedwork • 2017

With his Canon series, Dick Raaijmakers explored ideas and approaches dealing with morphological composition. My research into this subject has led to the development of software that allows working with such ideas. Morphology Study I, an eight channel work, is the first outcome of this work. This track introduces in a stereo reduction some of the material from it.

Prelude to Morphology Study I

Composed in 1997, based on voice transformations. These transformations are realized with Max on ISPW, the predecessor of MaxMSP. The voice belongs to Tammy, the girl of the boat.

Voices of the Boat • 1997

This improvisation happened quite unprepared and worked out very well (we think). This recording was broadcasted on Spanish radio. Marie: voice + live electronics; Younes & Johan: live electronics.

Improv Marie / Younes / Johan • 2012

This is the improv that Frances Marie Uitti (cello+electronics) and myself (electronics) did as part of the Wonderwerp series last May. The recording was made at LOOS studio, thanks to Ángel Faraldo.

Improv fm+jvkr • 2012

Two Van der Pol oscillators, an owl and of course a duad...

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Johan van Kreij (1969) improvises and composes music. In 1994 he started his studies at Sonology, in the Royal Conservatory in The Hague, graduating in 1998. Frequently he performs his music, solo or with other musicians.

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