Edition 24, March 2005

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We have dug into the depths of Jean Michel Jarre's private studio and looked at his custom one-off performance controllers.

There are more tech articles in the archives section.
  

The synths of JM Jarre pt. 2
The synths of JM Jarre
Algorithmic Music Program
Plastiman's new toy
The synths of Kraftwerk
The synths of Vangelis
Ultimate sequencer, part 2
Ultimate sequencer, part 1
Music software on Win XP
Software synths, part 2
Software synths, part 1

History of EM tech, part 3

History of EM tech, part 2

History of EM tech, part 1

The ANS
Russia's Theremin
The Elka Synthex

    


This month's Artist Profile is Klaus Schulze, one of the pioneers of classic electronic music, and one of the founders of the Berlin School direction of EM.

Also remember our Concert & Festival page which is perhaps the biggest overview of electronic and ambient concerts and festivals from all over the world!

The synths and gear of Jean Michel Jarre
Part two: Custom instruments and controllers

By Glenn Folkvord

Throughout the years, Jean Michel Jarre has dazzled millions of spectators with his unique multimedia concerts that blend ancient techniques with the latest electronic inventions. He has used both off-the-shelf synthesizers as well as developed new instruments and controllers for artistic and visual expression. In this article we will look at some of his custom music instruments.

Most of Jarre's custom instruments are not synthesizers as such; most of them are controllers. They trigger MIDI data which is sent to a synthesizer or computer, which in turn plays a sound. Jarre has also had special modifications done to many of his standard synths, but his main custom controllers are:

  • Laser harp fixed MIDI controller
  • LAG Circular portable MIDI controller
  • LAG Insecte portable MIDI controller
  • LAG Mad Max portable MIDI controller
  • LAG Grand Central fixed MIDI controller
  • Magic fixed MIDI controller
  • Geiss Matrisequencer custom sequencer
  • Geiss Digisequencer custom sequencer
  • Geiss RythmiComputer custom drum computer

The laser harp
The laser harp is probably Jarre's most famous instrument. It was originally concieved by French musician Bernard Szajner and constructed by Denis Carnus and Didier Badez in April 1981. But Jarre was the first major utilisation of the controller, during his China tour in October 1981. The first harp version used a 4 watt Spectra Physics argon-ion laser, which was separated into 12 beams by a holographic line grating. Each beam hit a photo-cell, which was linked to a microcontroller which transformed the optical data to analogue levels. These voltage levels controlled drive notes (VCO), attacks (CA) and memory (sequencer, arpegiator). At the time, the harp controlled the sounds of the French made synthesizer RSF, designed by Rubin Fernandez.

Later harps also have foot switches which allows for changing between different scales. This explains why Jarre can play different notes on the same beam. Certain versions of the harp play pre-stored notes which means Jarre has to break any beam to get the right note. The photocells can also recognise at which height the beams are broken, and the angle of the hand, which allows for artistic expression such as modulation.

Since 1981 Jarre has developed new versions of the laser harp for almost each of his subsequent concerts, allowing for the ergonomics of each stage layout, artistic control and improved technology. In the mid 80s Jarre hired laser specialists led by Philippe Guerre to develop a frameless version of the harp, and nearly a dozen different versions of the harp has existed. The 1994 - 95 version, used in Hong Kong and Paris, was designed by Yan Terrien and used a 20 watt argon laser. The latest version was used in Beijing on October 10th, 2004 where the beams were angled at 45 degrees over the heads of the audience, and Jarre for the first time not having to use asbestos gloves to protect the skin of his hands.

One of the great myths about the laser harp is that is simply doesn't work, and that Jarre only mimes it. While it has been performed with the sound in playback mode at certain concerts, due to the harp's fragile technology and dangerous weather conditions, the harp actually work. It's futuristic appearance is based on simple technology: The basic concept of the harp is to have one laser bream split into several beams, and sensors that register Jarre's hands as they break the beam. Once a beam has been stopped, the sensor relays a signal to a computer which plays a sound. The laser generator is located beneath the stage, where a mirror mounted on a positioning scanner reflects the beam and breaks it up into 8 or 12 beams. Photocells are placed near the scanner, facing upwards. The cells receives the light sent by Jarre when his hand breaks the beam. The photocells send analogue signals to a computer with an analogue input / output card and a MIDI card. The computer runs software that feeds the MIDI card and send signals to the sound source. With foot pedals, Jarre can change the number of beams used, or which programs should be triggered in the computer, thus allowing the same beam to play different sounds.

A few artists other than Jean Michel Jarre have used laser harps of various designs, and a typical harp like Jarre's will cost around 20.000 Euros (25.000 USD) to build from scratch.

The LAG controllers
The French instrument company LAG was formed in 1982 by Michel Chavarria and Frederic Garcia to produce electric guitars. After a while, a research and development division was established, to work on MIDI controllers. In 1987 Jarre was introduced to the company at a Paris music fair, bought some of their equipment and kept in touch for the development of instruments for his 1988 concert, Destination Docklands in London. LAG designed and constructed four controllers for Jarre between 1988 and 1990; the Insecte (pictured), the Mad Max, the Grand Central, and the Circulaire.

Insecte key technical specifications:

  • Internal computer based on the Z80 processor
  • Polyphonic 2,5 octave keyboard
  • 29 touch sensitive keys with aftertouch
  • One audio microphone for EMS vocoder effects
  • One pitchbend joystick
  • One program change joystick + switch for two banks of four sounds
  • 7-digit LED display for programs
  • Octave transposition
  • MIDI selector for channels 1 to 16
  • Otari time code LCD display for SMTP synch
  • Separate outputs for audio, time code, MIDI,
  • Microphone for internal communication and external signal

The Insecte took two months to build by a team of 5 engineers during the spring of 1988. Jarre was inspired by films such as Brazil and Dune and wanted an instrument that looked futuristic, yet old and used. The skin of the body was painted so as to look worn and dirty, uncovered by archeologists of the future.

At the famous Houston concert in 1986, Jarre used a huge controller called the Magic. This semi-circular keyboard has supersized keys that light up when pressed. Apart from sending musical MIDI data to computers, it could also control lights and other special effects. LAG developed an enhanced version of the keyboard (pictured) that spans 8 octaves with 88 keys in a semi-circle but with the light-keys of the Magic above the regular keys, still lighting up as zones in the keyboard are assigned to the big keys above. Apart from looking futuristic, these semi-circular keyboards gives the advantage of being able to play the entire keyboard without bending the wrists. Jarre played this controller at his 1990 La Defence concert in Paris and his 1993 European tour.

The LAG Circular is a semi-circular (actually, banana-shaped) portable MIDI controller, also built especially for Jarre in 1988. Jarre has later replaced by with the Roland AX1 and other portable controllers.

Insecte key technical specifications:

  • 37 touch sensitive keys
  • Joysticks for pitch bend and volume control
  • Controllers for program change up and down
  • 16 channels of MIDI

Another 1988 creation was the big "grand central" keyboard, or rather a collection of keyboards, synths and other equipment built into one unit. The idea was to create a visual focal point in the form of a mobile "laboratory" from where Jarre would conduct Destination Docklands while retaining the idea of playing music on electronic instruments. The unit was placed in the centre of the floating stage, which was so big it had to be registered with the British authorities as a sea-going vessel.

Grand Central key technical specifications:

  • Main keyboard of 8 octaves and 8 programme banks
  • 1 small keyboard with inversed key colours and custom decoration
  • Integrated synthesizers (Roland D550, Dynacord ADD-1, AKS, Emulator, etc)
  • 2 computer monitors
  • 3 video monitors
  • 1 Underwood typewriter connected to an Atari 520 ST
  • 1 Octapad electronic percussion
  • One telephone (gag)
  • The Magic keyboard integrated MIDI controller
  • Total weight 600 kg

The Geiss instruments
It's very handy to have your own engineer built new instruments for you, if you have an idea that your normal gear won't support. Michel Geiss (pictured) worked with Jarre for two decades as a musician, producer, and allround technician and engineer, sometimes building custom boxes for Jarre to play with. His Matrisequencer, later developed into the Digisequencer, is one of the instruments Jarre has used the most.

The Geiss Matrisequencer 250 was developed in 1977 and first used on Equinoxe. It functions as a duophonic sequencer which can play 2 x 50 notes or 1 x 100 notes, programmable by inserting pins into a matrix board, thus not only visualising the sequence but also making it physical. This, according to Jarre, would make the composing and programming experience more intuitive and tactile than simple button pushing.
 
In 1992 a team of 4 engineers led by Michel Geiss spent 6 months to develop the Digisequencer (pictured), a digital version of the Matrisequencer. The processor is based on an Atari 1040 with custom circuitry designed with Vamp MacCad software. As before, programmed by inserting pins in a 16 x 79 matrix board. The new sequencer can be triggered by a regular keyboards. Jarre enjoyed the new version so much that he named a song after it, Digisequencer which was played at concerts between 1993 - 95, as the updated sequencer is also a realtime live performance tool, enabling Jarre to kick off sequences by actual human interaction with a digital instrument.

Digisequencer key technical specifications:

  • Based on Atari 1040 microprocessor
  • Real time programming of MIDI
  • 1392 matrix points, each with it's own LED diode
  • 16 patterns in 8 tracks playable simultaneously
  • Tracks can be either polyphonic or monophonic
  • Each track has it's own MIDI channel
  • Octave transposition -2 to +2
  • Delay from -99 to +99 milliseconds
  • Real time MIDI synch start / stop / continue
  

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