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Piano Spiral - Franz Liszt's "Hungarian Rhapsody #2" [FIXED]

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Uploaded on Dec 7, 2008

This is the output of a visualization system I thought of a couple of days ago.

In a piano, notes repeat every 12 semitones (or keys, both black and white), and each whole interval doubles the frequency of these notes. Together, these notes form what we call a pitch class.

It occurred me that the shape of a spiral has all the correct properties to represent this relation between notes. So I wondered, how would piano music look like if it was represented as a spiral of keys?

I quickly hacked together a PHP script that reads MIDI files and creates the frames of this video you see now. It's a rough draft, but it works pretty well!

In this representation, the notes with higher frequencies are in the center of the spiral, starting with C8 (as in the piano). Each radial block of keys represents a single pitch class, so octaves (when two adjacent notes of the same pitch class are played togeter) look like a pair of keys being pressed radially. You'll see this a lot in the Scott Joplin videos I'm going to upload shortly.

To start, I decided to use Franz Liszt's "Hungarian Rhapsody #2", not only because it is a beautiful and amazingly intricate piece of music, but also because it has all the elements that I'd like to check out in this form of visualization.

The algorithm isn't missing any notes now, so I figured I'd give justice to this piece, at last.

Anyway, enjoy!

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