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Project Description

Unroll is a Python module to ease transcription of piano rolls to sheet music. It transcribes either a MIDI file or a video of a piano roll. It finds the notes, the tempo, roughly separates the hands, and writes the result in a Lilypond file. In particular

You can use it like this:


from unroll import video2scan, rollscan2keystrikes
focus = lambda im : im[[156],58:478]
scan = video2scan(videofile = "limehouse_nights.mp4", focus = focus)
keystrikes = rollscan2keystrikes(scan)
keystrikes = ks.transposed(26)
keystrikes.transcribe('', quarter_durations = [2,10,0.02])


from unroll import midi2keystrikes
keystrikes = midi2keystrikes('tiger_rag.mid')
ks.transcribe('', quarter_durations = [50,100,0.02])

Then you must edit to correct the mistakes and when you are done you compile it with



Unroll can be installed by unzipping the source code in one directory and using this command:

(sudo) python install

You can also install it directly from the Python Package Index (PYPI) with this command:

(sudo) pip unroll install


Unroll is an open-source software originally written by Zulko and released under the MIT licence. The project is hosted on Github and everyone is welcome to contribute ! Please give feedback if you are using it and encounter difficulties.

Release History

Release History


This version

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TODO: Figure out how to actually get changelog content.

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Download Files

Download Files

TODO: Brief introduction on what you do with files - including link to relevant help section.

File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
unroll-0.1.0.tar.gz (7.3 kB) Copy SHA256 Checksum SHA256 Source Apr 16, 2014

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