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'Rumor' is a realtime monophonic (with chords) MIDI keyboard to Lilypond converter. It receives MIDI events, quantizes them according to its metronome on the fly, and outputs intelligently handwritten-like corresponding Lilypond notation. Tempo, meter, key and other parameters can be set via commandline options. Rumor can use ALSA/OSS or emulate MIDI input with computer keyboard. It is scriptable with Guile. It has been tested on several major J. S. Bach organ pieces.


User guide available in HTML format from


Download version 1.0.3a (stable)
released on 21 May 2004


Related Projects


LicenseVerified byVerified onNotes
GPLv2Janet Casey3 March 2004

Leaders and contributors

Vaclav Smilauer Maintainer

Resources and communication

Audience Resource type URI
Bug Tracking,Developer,Support E-mail

Software prerequisites

Kind Description
Required to use pthreads
Required to use OSS *or* ALSA (ALSA is recommended)

This entry (in part or in whole) was last reviewed on 23 May 2004.


Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

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