Category Archives: GMS

The GMS (Gestural Music Sequencer), written in Processing.org by Unearthed Music recording artist and AudioCookbook.org founder John Keston, analyzes video input and converts it into a sequence of musical information in real-time. Each frame is processed to find the brightest pixel. The x coordinate is converted into pitch while the y coordinate is translated into dynamics. The application was also designed to use probability distributions on pitch and durations.

Getting Reacquainted with the GMS

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triquetra_rehearseI have had a number of problems migrating my Processing.org application known as the GMS from my old MacBook Pro running OS X 10.4.11 to my new one running 10.5.7. The first issue was alack of support for the IAC drivers in Java, next were some funky conflicts with the Java class I was using to load and save presets. With the help of Grant Muller I have solved these problems.

While I was at it I took on a couple of other issues as well in preparation for my performance on Sunday. All that’s left is for me to become reacquainted with the application in tandem with Ableton Suite 8.

This is actually the hard part because I have use the application effectively as an instrument and real-time visualizer. One problem is running out of hands and fingers while producing the visuals and capturing the MIDI clips. Another danger is the music becoming repetitive while making adjustments. Here’s a quick recording I made while practicing.

Reacquainting Myself with the GMS

Ostraka with Dial System Live

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5tgr5tdryMy new duet, “Ostraka with Dial System” (John Keston and Graham O’Brien) is performing at the Kitty Cat Klub in Minneapolis on Sunday, August 9, 2009. This group combines the stochastic, angular melodies produced by the GMS with live drumming. Gestural video input is simultaneously projected onto a screen and processed into musical data. The results are captured in real-time and molded into spontaneous compositions. Special guests include DJ Zenrock and Terr the Om.

To get an idea of what you might hear, have a listen to these examples from a rehearsal recording that was made in May, 2009.
Ostraka with Dial System Jam #2

Ostraka with Dial System Jam #3

Hammering

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expandThese last three sounds are examples representative of what I’ll be producing during a performance outside of the Weisman Museum at the University of Minnesota in Minneapolis this Thursday, July 9, 2009. The performance is scheduled during the Art(ists) on the Verge opening. My part is to create audio accompaniment using the GMS during a projection piece by Andrea Steudel that includes live acting by David Steinman.

Hammering