SoME 2010 March: Nyquist frequency

Sound Of the Month Edition

This is what you get when you mess with Nyquist frequency!

Nyquist frequency

Glissando from 422400 to 422,4Hz with sampling frequency of 44000Hz

In the analog world the hyperbola from the right side of the graph would go all the way up. You actually wouldn’t be able to hear such high pitches, but you’d see a nice hockey stick on the spectrogram. However digital sampling is not able to handle frequencies higher than half of it’s own frequency – that’s the Nyquist theorem. And that’s when the weird things start to happen :)

Sounds like a plasma cannon:

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Falasol Timbre project file: Nyquist effect.timbre

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Reader's Comments »

  1. By Rafal Jozefowicz on April 12, 2010 at 7:03 pm

    Awesome sound! I am playing it all the time :)

  2. By koshik on April 15, 2010 at 6:05 pm

    Nice! More soon to come ;)