popup-trombone
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it's a trombone you play by resizing a POPUP window
🎺 POPUP TROMBONE 🎺
it's a trombone you play by resizing a POPUP window (but it doesn't really sound like a trombone, sorry)
play it online here: http://matthewrayfield.com/goodies/popup-trombone/
a project by http://matthew.rayfield.world