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RGB Music RENGA:
999 Views of Skyscrapers from Great Lawn in Central Park,
New York City, Summer 2009 by Kenji Kojima

RGB Music RENGA has two versions. These two are same algorithm.

Full Screen Installation (snap shots and excerpt video on the Web page)
Web Browser version (Web application) requires revWeb plugin.
   (Windows has to install free version of Apple QuickTime)
"RGB MusicLab" right column is the concept and the method of RGB Music RENGA.

RGB Music RENGA is a computer algorithmic composition. The program creates about 10 to 60 seconds of compositions from RGB (Red Green and Blue) values of photographs.

RGB Music:
The program reads RGB value of pixels from the top left to the bottom right of an image horizontally. One pixel makes three notes of sounds, and the length of note is determined by high or low value of the pixel. RGB value 120 or 121 is the middle C, and RGB value 122 or 123 is added a half steps of the scale that is C#. RGB value 0,0,0 is no sounds.

It is not an impression of a painting or a photograph of a musical variation. It composes a score from an image directly.

Improvisation: a little more details about the composition
The music is not a recorded file. The music is an improvisation by the software. Total number of pixels, tempos, scales and instruments are changed in every each session. The basic conversion from RGB Value is a twelve-tone scale music, then it is filtered to another scale. R, G and B values are assigned to an instrument from 123 different instruments. These musical elements, and the number of photographs are described at the bottom center. The color score of mosaic (chart of pixels) and XYZ mapping score are shown in the right column.

RENGA and Photographs:
The project title of “RENGA” is linked impromptu poetry in Japan. The beginning of lines of a RENGA became HAIKU (a poem of seventeen syllables). A typical RENGA sequence is comprised of over 100 stanzas. A series of everyday life scenarios of photographs was inspired by Hokusai's Thirty-six Views and One hundred Views of Mount Fuji.




RGB Music RENGA: Web Browsr Version.Please install revWeb plugin on your browser before you open the project page.

999 Views of Skyscrapers from Great Lawn in Central Park, New York City, Summer 2009
Full screen installation version snap shots   





RGB Music RENGA: Web Browser Version. Please install revWeb plugin on your browser before you open the project page.

New York City Subway, Photographs Spring 2005 - Fall 2007
Full screen installation version snap shots






Contact: index@kenjikojima.com





RGB Experimental Music Laboratory

MacOS / Windows Application
It was gathered Kenji Kojima's sound art studies and made an application.


RGB MusicLab Version 35: Download Freeware


RGB MusicLab for MacOSX Version 35 (Universal binaries)
Do not put the program into a double-byte character name folder.

XYZ MusicLab (XYZ Coordinates into Music) Download MacOS Only


RGB MusicLab for Windows Version 35
Program requires a free version of "Apple QuickTime"



What's New in V35:
• Fixed "Import RGB Music Data".
• Fixed "Import mosaic to 3D (3D Palette)"
• Fixed Music Player (Only Windows version).



Do you like RGB MusicLab?
Please consider making a donation to support Kenji Kojima's works.



RGB MusicLab converts RGB (Red, Green and Blue) value of an image and surface points (X, Y, Z) of 3D object to chromatic scale sounds. The program reads RGB value of pixels from the top left to the bottom right of an image. One pixel makes a harmony of three note of RGB value, and the length of note is determined by brightness of the pixel. RGB value 120 or 121 is the middle C, and RGB value 122 or 123 is added a half steps of the scale that is C#. Pure black that is R=0, G=0, B=0 is no sounds.

It is not an impression of a painting or a photograph of a musical variation. It is not an arbitrary process. It composes a score from an image directly. It is simple and clear algorithm, and does not have any hidden or mysterious tricks. Anybody can get a same result if he/she takes same processes.

Quick Start:
Double click on MonaLisa icon. Program is opened. Drag-and-Drop your JPEG image (such as a digital camera image) onto the right image panel (1 on the top figure). Mosaic of the image is made on the left panel. Click on "Create RGB Music" (9 on the top image). Progress bar apears. Wait a short while. QuickTime controller apears. You can listen your music. If you like to save it to MIDI file, click on "Save Music" (10 on the top figure).



Mona Lisa Scale Variations by Kenji Kojima
Studies of 8 varieties of scales. Chromatic, Melodic Minor, Harmonic Minor, Melodic Minor, Whole Tone, Gypsy, Blues and Okinawa.





More about RGB MusicLab