Saturday, May 14, 2011

Graphing pitch and volume

Different ways of displaying pitch and (measured a little later) volume using TurtleArt

Direction = pitch, radius= volume

with only dots at the end of the line

colour determined by volume (measured a little later again)

x = pitch, y=volume

  • No code is given here, create these graphs
  • Make other graphs
  • A third variable to graph is number of occurrences of a pitch/volume pair
  • Can you get useful information from these graphs? Can you tell speech from music, TV program from advertisment?
  • The pitch block only shows the pitch of the loudest component. This is derived from a FFT (Fast Fourier Transform). Can you program a Python block to show all the spectral components and their amplitude? (Look at the source to see how the FFT is done)
  • With more than one laptop you can log more data. Can you combine data from multiple laptops and graph it? How will you synchronize the data?

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Anonymous Anonymous said...

(measured a little later again)
;) this is prevented inserting show "now shout to the machine", wait 3, volume.
I am learning a lot from your site, my copybook is starting to be Unluckily my students are too "old"... for this

Sunday, October 16, 2011 11:19:00 AM  

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