God said: Let the be light and Philips said: Yes, Sir.

God zei: Er Zijn licht - en Philips zei: Ja, Meneer.

The Glow Show in Eindhoven - November 10, 2012

Edwin van der Heide

Laser / Sound Performance
LSP is a research trajectory exploring the relationship between sound and three dimensional image by means of laser projection. In 1815 Nathaniel Bowditch described a way to produce visual patterns by using a sine wave for the horizontal movement of a point and another sine wave for the vertical movement of that point. The shape of the patterns depends on the frequency and phase relationship of the sine waves. The patterns are known as Lissajous figures, or Bowditch curves.

LSP interprets Bowditch's work as a possible starting point to develop relationships between sound and image. Since sine waves can also be used to produce pure (audible) tones, it is possible to construct a direct relationship between sound and image. Frequency ratios in sound, de-tuning and phase shifts can have a direct visual counterpart.

Although theoretically all sounds can be seen as sums of multiple sine waves, music in general is often too complex to result in interesting visual patterns. The research of LSP focuses on the subject of composing signals that have both a structural musical quality and a time-based structural visual quality. Different relationships between sound and image are used throughout both the performance and the installation form.

http://www.evdh.net/lsp/

'We do not truly see light, we only see slower things lit by it, so that for us light is on the edge--the last thing we know before things become too swift for us.'

"Virtue-even attempted virtue-brings light; indulgence brings fog."

CS Lewis