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Processing Piano Tutorial Videos in the Browser


There are a lot of piano “tutorial” videos out there, but most of them aren’t step-by-step walkthroughs. They mostly look like falling raindrops that light up piano keys. These tutorials are often made with a tool called Synthesia. I’ve struggled with these videos because I can’t keep up with the falling notes or figure out the chords I need to play. It’s up to you to keep track of the light bars.

PianoReader is a web tool that watches piano tutorial videos and spits out the notes and chords. Luckily, the tutorial I wanted to run only used the white keys, so I didn’t worry about the sharps in this project. If you speed up the video for faster processing, frames get dropped, the seconds get messed up, and the song sounds weird.

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