Geert-Jan / Holland / - composer


Yokomono-Pro is a car horn concert performed by vehicles moving through a city. Each city and each type of vehicle has its own tone and each combination results in a different concert. The project was developed and written as a commission by the International Sonic Residency 2008 for The KHOJ Artists’ Association in New Delhi and was presented one year later at the India Art Summit. In New Delhi we focused on the traffic and the amazing amount of noise it produces. One of the most prominent noisemakers is the three-wheel taxi, which uses its horn very frequently in situations where we would use our indicators, headlights or mirrors. Taxis are the most recognisable means of transport here, playing a dominant role in the city's soundscape. We arranged for the collaboration of thirty so-called ‘tuck tuck’ taxis and operated their horns via remote by means of transmitters. By playing this ‘taxi horn choir’ in combination with spatial manoeuvres an urban sound choreography was created. Yokomono-pro has also been performed at the Transmediale in Berlin and at TodaysArt in The Hague.


Yokomono-Pro can be thought of as a ‘car orchestra’ with the car horn as its instrument, or as a ‘John Cage happening’, as a choreography or refined celebration of a football victory or a marriage. And it is all that, but then again it's not that simple. It involves movement and sound in the public space and that makes it different, in many ways, from a traditional performance with static instruments in a closed environment. Also, the car is a ‘charged’ object, occupying an important economic and social position, while evoking varying associations and emotions. As an urban composer the challenge for me is to redefine this dominant element in our surroundings and find structure and harmony for it.



While developing the project we found that it was crucial to control the horns from one central point instead of having the taxi drivers play from a score. They were incapable of using the horn at the exact moments that were prescribed by the score, which made it impossible to arrive at some sort of synchronicity.

Therefore the idea presented itself to use a remote control in the form of a transmitting system for the horns. The system had to be both simple and usable anywhere in the world. This was easier said than done: we had to build a system with specially designed hardware. Nevertheless, we decided to build everything again from scratch in New Delhi, Berlin and The Hague, as the system did not perform as expected.

We are now using six telephone channels distributed among the cars via walkie-talkies. The system is functioning without any disruptions now, but we still need to make it more precise, simpler and cheaper.


The orchestra is complete now, the compositions have been performed internationally three times and the technique is now stable. I wrote the first compositions without really knowing the character of this instrument. These pieces had as their main ingredients atonal timbres and movement, exploring the musical possibilities of the orchestra and its possible social role. With the information thus gathered I can now go one step further and focus on composing works that specifically address the social function of the automobile as a medium, taking into account the experiences and insights I have gained so far.


Project 1: Yokomono-pro STRP/Eindhoven

In this project we explore the tonal character of the horn and its possibilities. Car horns are designed to produce short range signals. A little further away they soon become inaudible, which makes it hard to work in a truly spatial way. That's why, for STRP Eindhoven, we want to take the city itself as a sound subject. To achieve this we have chosen a setup that involves thirty circulating trucks, controlled by us. By playing the horns of these trucks as they circulate, we emphasise the urban dimensions. Movement and sound together create a sonic choreography within the soundscape of Eindhoven. There will be two routes for the trucks: one circling an intersection and one shaped like a flower around it (see diagram). Four of the trucks will be parked at designated points. The composition consists of eight channels: two for the circle, two for the flower, and four for the stationary trucks.


Project 2: Plan Marriage / timelab Ghent

This concerns the social nature of the car in our society. After Berlin, Ghent has the second-largest Turkish community outside of Turkey itself and traditionally they celebrate marriages by forming a procession of cars that sound their horns. In Western cultures as well music forms an integral part of marriage ceremonies.

Under the guidance of the timelab organisation and in collaboration with the Turkish community of Ghent – politicians, a youth organisation and musical Turkish families – we will expand and harmonise this Turkish horn sounding tradition with our technology. Our compositions will incorporate traditional Turkish rhythm patterns as well as modern techno, as both are part of this second generation of young Turks’ culture.

We want to write several compositions together with Turkish musicians and together with car companies and young people build the technique, which will then stay in Ghent. Instead of realising a unique, one-time project here, we want to leave behind a permanent change in an existing tradition. I regard this as one of the most important and most challenging ambitions of my work.


Project 3: Plan Requiem / The AV Festival in Newcastle

The funeral procession is a special tradition, also now that cars are used, and used to be accompanied by music before it was transformed into a mostly sterile and formal occasion.

I intend to extend the present tradition of the funeral procession with a car requiem. I realise that this is a sensitive and very personal issue, and therefore I have decided to literally keep it personal: together with my brother, the visual artist Erik Hobijn with whom I also did Station to Station, I will write a requiem for my father, who is still alive.

The requiem will consist of two parts. The journey to the cemetery consists of slowly building layers of long notes and a line of cars snaking through the city. The journey back is in strong contrast with this and is short and happy. Celebrations are in order.

Meanwhile, we have received an invitation to present this composition at the AV Festival in Newcastle in 2011, as sort of a rehearsal.



we would have curiosity about your

> words: the car is a 'charged' object, occupying an important economic and

> social position, while evoking varying associations and emotions. As an

> urban composer the challenge for me is to redefine this dominant element in

> our surroundings and find structure and harmony for it.  Because the theme

> of our Colloquy / Current situation / please, take in consideration to

> mention also more about your opinions, further details of situation of your

> country - the theme Current situation is by the way about conditions under

> which exists today art in Europe. It would be interesting to share

> experience with others colleagues from different European countries...


yes your touching the centre (or one of them)

it has to do with the process of working or better the way I work

first  I just use the car as a urban composition tool that had the possibility of moving sound

and intervention/composition of public space.




when you do this , you start to learn what it is your working with

and its a very complex object

we use to call the car our "holy cow" we use it for weddings, funerals, celebrating, sex (In the US I think)

etc etc.

some of these have a strong sonic component (you must know the football madness in cars all over the world (except the US?)


so you move to understand the soul of your instrument

that is why I feel it is my duty to experiment with that part plus to see if you can create new sonic rituals that adapt to our present time and tradition.

If I can give a new sonic tradition back to the sterilised funeral, (a tradition that we had but lost) then I feel I have truly done something with my live.

it is then important to make it a tradition and NOT my personal composition or artistic property.

traditions is community owned so I must involve them and they must embrace it and I must give it to them for free.


these things are not specific to my country

I have done it in india and had long talks with friend in Cairo to do it there too

it is however obvious that each country responds different for we are not equal and differ in many ways.

but the car does have a important roll  anywhere so it is relevant everywhere.



so to answer your question I think a artist today must take a active role in society

not like politicians or religions but in a open way.

and look for ways to in inject positive elements in our society.


specific for my country (holland) I have the strange feeling that it is getting more extreme

and as a artist and as a person I wonder if I can just stand there and watch it happen

I only do not really know how I can do something, but I am working on it


in general we in europe are not improving very much either, but maybe that is natural after the post WOII positive wave


I would like to be in Cairo now making revolution but that is not up to me

my role is here



I wrote this all in one go

hope it makes sense

as you can see I am a romantic that takes it serous



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