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After developing and experimenting with the Helmholtz-prototype, based on the Helmholtz double-siren, I concluded a lot of things. In a nutshell; precision is important. Important for musical variables, like pitch, timbre, volume, harmonics, interference and more. But precision is also important for the ability to reproduce the same sounds with the siren-instrument, over and over again; studying the instrument.

I redesigned parts, based on the prototype. For production I seeked collaboration with a CNC-machining company; Rijfers Metaalbewerking in Alphen a/d Rijn. Basically, my technical drawings are adapted and sent to numerical controlled machines, capable of producing the parts. With the capabilities of these milling- and lathing-machines in mind, you can produce smart parts, with great precision.. 

First testruns made with Loman-siren.

Its 12 tones are based on equal temperament.

It is played by a klavier, one octave wide.

The double siren, based on Helmholtz’ double-siren, wich he used for measurement purposes, has got various just intervals. The intervals that we will be able to use for the first compositions are gathered in a scheme:

The green column represents  series of holes resulting in tones of different pitch. These series of holes will be available for the first compositions. The names of familiar intervals are standing above the musical intervals. source: http://nl.wikipedia.org/wiki/Lijst_van_intervallen

The Siren-orchestra will be presented on the Symposium On Sound on the 27th of april.

for details, check www.veenfabriek.nl

This is the new soprano-siren setup.

Some pictures of the Loman-siren coming together in the workshop.

The images above are details of the prototype-Helmholtz-siren. They will be used for publicity purposes.

René Bakker 2008