What do sounds look like with a Raspberry Pi Pico? #piday #raspberrypi @Raspberry_Pi

via Raspberry Pi Blog

First off, let’s make sure we know what all of those words mean, because “audio spectrogram visualiser” is a bit of a mouthful:

A spectrogram is a way of representing the range of frequencies in a signal and their strength, or “loudness”. For example, a spectrogram could show the mixture of higher and lower frequency sounds that make up the sound of a spoken word.
The visualiser bit comes in when these frequencies are presented as waveforms that you can see on the screen.
And the audio part is simply because Sandeep is visualising sounds in this project (rather than, for example, radio frequencies or seismic waves).

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