Interesting siren-like drones from this experimental instrument -

6 oscillators being triggered by light sensors reacting to the movement of the clouds across the sun – followed by a composed 16 min soundscape where each of the 6 oscillators are fed through echo’s and reverbs.

They seem to sound a little sad every time the clouds roll in . . . understandably so. – Link

From the pages of MAKE:

Solar Xylophone MAKE:12 p.98 – Link
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