Csound siren

I was asked to create this siren for a performance of Varèse's Ionisation by the UGA Contemporary Chamber Emsemble. It is a very simple instrument which is designed to be entirely playable by keystrokes. If you are interested in playing with it, feel free to download it here. It was designed using macCsound, a free program for the Mac platform. There are also versions for other platforms.

In order to play the instrument (which controls both the high and low siren sounds), I had to devise a custom part, which I would be happy to share with anyone interested in seeing it.