Vocal Instant Composition


May ’68-inspired trash opera performance a re-sounding success


On Saturday 9 June 2018 two members of the Genetic Choir, Ralph de Rijke and Jeannette Huizinga, joined percussionists Robbert van Hulzen and Dirk Bruinsma and dancer Michael Jahoda to take part in a structured, but largely improvised opera whose lyrics were drawn from the Situationist graffiti and slogans of the May ’68 uprising in Paris. Music was played on trash items like truck springs, pickaxe heads, and metal sheets. The opera – part of MayDays, 3 evenings of art performances curated by The Warp – was held in the Kunstkapel in Amsterdam, a circular space with some challenging acoustics. 🙂 The performance was a great success, and the group plans to continue shouting, singing and banging things under the name Schroothoopera. The first such appearance will be at the Trashlesstival at De Ceuvel on Saturday 7 July 2018.

Genetic Choir on Utrecht Impro Night BUI – tonight!

Join us in Utrecht tonight for a Genetic Choir concert in double-bill with Hugo Ariëns on the June edition of

BUI (Bevordering Utrechtse Improvisatie) in the Moira, Utrecht

Tuesday, 12 June, doors open 19:30, concert starts 20:00.

The evening includes a free play session after the two sets of Genetic Choir and Hugo Ariëns.


Moira, Wolvenstraat 10, Utrecht

Collaborative Writing meets Impeded Speech meets Genetic Choir – tonight!

Genetic Choir singers will perform a retake of the CIRCLE performance developed together with Cathalijne Smulders and Tamara van Scheppingen tonight at Theater Perdu in Amsterdam.

The evening is called “Weaving Practices” and showcases several writers who engaged on collaborative practices of creation.

In CIRCLE, Cathalijne explores together with the Genetic Choir the vocal and lingual realms that can be entered when engaging on poetic grounds with a performer with aphasia, a speech impediment.

See you tonight!


Friday, 1 June 2018

doors open 19:30, evening starts 20:00

Entrance: 9 € / 6 €

Theater Perdu, Kloveniersburgwal 86, Amsterdam



New Friday Morning Sessions from September 2018

In September will start a new series of eight Friday morning sessions, in a two-weekly rhythm.

A pioneer group of singers has already inscribed, so it will definitely happen! Who else is in? 🙂

We are looking for people who have done at least one Genetic Choir workshop before and who want to commit to a stable training group for this autumn.

All core aspects of Genetic Choir singing will be covered – stillness and daring, working melody, rhythm and strange sound. Engagement, availability and timing. Crystallizing your material and composing together as a swarm of singers!

If you want to join, but you haven’t done a workshop before, there is one last place available this weekend (26/27 May = click here).

If we know you already, hook on for this autumn:


PLACE: studio De Eester, C. van Eesterenlaan 302, Amsterdam
DATES: every second Friday morning, starting September 7th, 2018 (8 sessions)
The single dates are: 7-09 / 21-09 / 5-10 / 19-10 / 2-11 / 16-11 / 30-11 / 14-12

TIME: 10:00-12:30
COSTS: 232,32 euro for the whole block (192,- euro excl.VAT)

To reserve your place (if you have done a Genetic Choir workshop before):

  1. send us an e-mail via
    workshops@genetic-choir.org with your
    – name (and account owner from where you made the payment)
    – telephone number
  2. please transfer the workshop fee by clicking this payment link

For those of you planning far ahead: Friday Sessions will continue in the new year from January 18th, 2019  🙂

Genetic Choir Introductory Workshop in Breda on 14 April

For those of you in the south of the Netherlands and Belgium, there is a great opportunity get acquainted with Genetic  Choir work next Saturday, 14 April in Breda. Main workshop language will be Dutch, but we can accommodate English speakers as well. 🙂

(Nederlandse beschrijving zie beneden)

Organised by Musicaja Zangschool, we will work from 10:00-11:30 in a mixed group with adults and kids and go further until 14:00 with the adults only, to dive even deeper into the complexities and bliss of vocal instant compositions.

You can inscribe for the day via this link:


For participants not linked to Musicaja the workshop costs €40,- (bring in cash to the workshop).

Place is the Musicaja Zangschool on Bastionstraat 13 in Breda, Netherlands.

Bring lunch ingredients that you like for a shared lunch-picknick.  🙂


A.s. zaterdag 14 april organiseert de Musicaja Zangschool Breda een speciale workshop voor leerlingen en niet-leerlingen.

Gastdocent Thomas Johannsen, muzikaal leider van het bijzondere Genetic Choir, gaat met alle deelnemers aan de slag met stemimprovisatie:

Het Genetic Choir is een vocaal ensemble dat concerten zingt zonder muzikale afspraken vooraf. De vocalisten trainen elkaar als een improviserende microsamenleving, die uit stilte en alle soorten geluiden muziek laat ontstaan.
Maar hoe ontstaat vanuit toevallige klanken muzikaal materiaal? En hoe kies je elk moment welke kant je opgaat? In een Genetic Choir workshop trainen we daarvoor heel specifiek improvisatie vaardigheden, waaronder de vaardigheid als zanger soepel mee te bewegen in een zwerm van klank mogelijkheden, en hoe je tegelijkertijd trouw blijft aan jezelf. We trainen overgave en stevigheid, plezier in je eigen stem en plezier in de stilte. Timing, luisteren en contact houden – tegelijkertijd met jezelf, met je materiaal en met de andere zangers.
En daarnaast gaan we gewoon heel veel muziek maken. 🙂  Kortom, een vol programma voor een halve dag!

Meer informatie over de workshops (in het Engels) kun je hier vinden: https://geneticchoir.wordpress.com/genetic-choir-workshop/

Voor algemene info over het Genetic Choir, kijk hier: www.genetic-choir.org

De workshop duurt van 10 uur tot 14 uur (van 10 tot 11.30 uur zullen er ook kinderen van de Musicaja Zangschool meedoen).
Tussendoor gaan we met z’n allen lunchen. Neem allemaal een lunchgerecht mee wat je met anderen kan delen. Zo maken we een heerlijk lunchbuffet.

Je kan je voor deze dag aanmelden via deze link:


Voor niet-Musicaja-leerlingen kost de workshop €40,-, graag contant te voldoen bij aanvang van de workshop.

De workshop vindt plaats bij de Musicaja Zangschool aan Bastionstraat 13 (in de lage bijgebouwen).

Splendor concert with Matthäus passion fragments !

Tap dance, singing and percussion meet in a concert full of movement!

The Genetic Choir will sing an unusual concert next Tuesday in Splendor together with classical singer Brigitte van Hagen, the idiosyncratic Taiwanese percussionist Yung-Tuan Ku and tap wizard Marije Nie, who is the host of the evening.

Fitting the Easter Season, four Genetic Choir singers will work a piece of Bach’s Matthew passion into their instant composition offerings during the concert.

Come and witness this first emanation of a new line of Genetic Choir work, exploring close harmony in combination with free improvisation, which is planned to come to full bloom in this autumn’s (Non)Corpus project.

“Shouts, Whispers, Feets and Beats”

Tuesday, April 3, 2018

@ Splendor: Nieuwe Uilenburgerstraat 116 – 1011 LX Amsterdam

Time: 20:30-22:00

More info and tickets through the Splendor website

There is also a Facebook event to like!

Tomorrow, 9pm: Genetic Choir duo, guitar and dance in Bimhuis

Tomorrow (19 March), Genetic Choir singers Yinske Silva and Thomas Johannsen will sing an impro concert in the Bimhuis with guitarist David Golek and dancer Makiko Ito.

David and Thomas were asked to curate this BIMLAB evening in the Bimhuis café and David was specifically interested to work with another Genetic Choir singer and a dancer and that is how it all came together.  🙂

We loved playing together on our first and only rehearsal and therefore are very excited what kind of magic the concert tomorrow will have in stall for us. Come join us to find out with us!

19 March, 21:00

BIMHUIS, Piet Heinkade 3, 1019 BR Amsterdam

Entrance: standard 6 Euro, reduced tickets available.

Tickets/Info: https://www.bimhuis.nl/agenda/bimlab-33-curated-by-thomas-johannsen-david-golek-2/

Stemperformer/‘instant composer’ Thomas Johannsen en gitarist/componist David Golek zijn de curatoren van deze editie van BIMLAB, de concertserie met verrassende improvisaties in het BIMHUIS.

Met: Thomas Johannsen- Voice, Yinske Silva – Voice, Makiko Ito – Dance, David Golek – Guitar & toys.