Audio Cookbook

GMS Beta Release, September 28, 2009

I have decided on September 28, 2009 as the release date of the GMS, coinciding with my performance with Graham O’Brien, and my birthday. We can call it a combination Ostraka with Dial System and DJ Zenrock show, GMS beta software release, and birthday party. Currently I am releasing a binary version of the software for Mac OS X only. A windows version is in the works, with no prediction of when it’ll arrive.

The GMS is a Gestural Music Sequencer that I developed in Processing (processing.org). The application samples video and displays it either normally or inverted so it looks as though you’re looking into a mirror. Each frame is analyzed for brightness, then the X and Y data of the brightest pixel is converted into a MIDI note. These notes produce a non-repeating sequence based on movement within the range of the capture device.

For more details, including audio examples and video produced using the GMS, checkout the
GMS category. There’s also a Gestural Music Sequencer Documentary Short produced by Josh Clos, that does a good job of illustrating what the software does.

Beta Release of the GMS this September

I have decided to release beta version binaries of the GMS for both Mac and Windows sometime next month. There a few bugs I have yet to solve, like the application freezing if you choose the video device more than once. I’ll be including a readme that lists the known issues along with the application files.

One of the reasons for doing this is to get some feedback on the tool, and find out if anyone is interested in continuing development on the project as Open Source. There are some pretty tricky issues with Processing and video that perhaps a more advanced developer than me might be able to optimize easily enough. I am interested in moving on to some other projects, and am fairly satisfied with how the GMS works for my own purposes at the moment.

If anyone is interested in experimenting with this tool (I know of a few interested parties so far), let me know in a comment and I’ll gauge my efforts on getting a beta out soon or over a more extended time period based on your feedback.

GMS Leftovers

If you have been wondering why ACB is a little bit on the slow side lately, it’s because I have been quite busy doing other things, like my night class at CNMAT and releasing my solo album, Precambrian Resonance. So, after presenting 365 sounds in 365 days, I’ve been having a bit of a rest.

But now I am ready to dive into some new projects, including my duet with Graham O’Brien (drums) that we’re calling Ostraka with Dial System. We recently performed at a club in Minneapolis, but I neglected to record the show. However, I saved my document with the GMS clips I had captured. Here’s a short mix of a few of the remnants from the performance, unfortunately lacking the drums.

GMS Leftovers

500 Million Years From Now

It was recently estimated by Edward Guinan at the XXVIIth General Assembly of the International Astronomical Union that our lonely planet is nearing the end of its habitability for life as we know. Albeit, on a cosmological timescale. Between .5 and 1 billion years from now, increases in the Sun’s temperature will cause the Earth’s oceans and atmosphere to evaporate.

Shortly after reading this article I opened up my Ableton Live set from Sunday night to listen to some of the loops I had captured with the GMS during the show. After opening the document I pressed play and heard a stark landscape of reverberation. I saw visions of a lifeless, peace 500 million years from now.

What had happened was that when saving the document I had left all my master effects in their last position. I decided to capture these sounds and vary them over time. The effect chain on the master track included a low pass filter, bit reduction, delay, and reverb with nine parameters mapped to knobs on a controller. Here’s what I ended up with on the second take.

500 Million Years From Now

Getting Reacquainted with the GMS

I 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

My 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

These 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

Call and Response Part 2

Call and Response Part 2

Call and Response Part 1

Call and Response Part 1

GMS Ensemble Live Performance Segment #2

Here’s another segment of video from the Flashbelt after party on June 8, 2009. The music is still Graham O’Brien on drums and me using the GMS.

However, the visuals shown are mostly part of an excellent piece on gender transformation by Sinan G. of minneapolisartonwheels.org.

I think this short chunk of video is an accurate illustration of the spirit of the party.

In my mind the best parties are always in alleyways, sometimes in warehouses, and once in a while in apartment kitchens.

Click to view a 640 x 480 version of GMS Ensemble Live Segment #2.