Half a croissant, on a plate, with a sign in front of it saying '50c'
h a l f b a k e r y
Recalculations place it at 0.4999.

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Earth sound

The "atmosphere" preset in a keyboard will really mean that.
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For a given geographic location, get the readings of barometric pressure for a whole year, remove DC component, normalize data to [-1,1] and save it as a wav file. Play it looping thru a sample player. Combining sounds from different latitudes, i.e. sahara, antarctica, australia, etc, we can get an authentic sound from the earth.
piluso, Feb 07 2016

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       Humidity readings as a counterpoint.
bungston, Feb 07 2016
  

       As a perk we could play it backwards.
whatrock, Feb 08 2016
  
      
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