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.

Google Nexus One as an Electronic Music Device

Posted on January 13, 2010 by John C.S. Keston

With all the Android devices appearing recently, I’ve decided it is time to upgrade my four year old Sony Ericsson K800i to a Google Nexus One smart phone (I think I’ll hold off on calling it a super phone for now) and perhaps consider using it as a controller as I have been with the iPod Touch. Another consideration is attempting to do some music software development on the Android platform. Perhaps porting the GMS, developed in Processing.org, may even be possible with the Nexus One’s 1 GHz Snapdragon (Qualcomm QSD 8250) processor and the built in video camera.

I currently have the phone in hand and will write about my impressions once I’ve had time to familiarize myself with it. It’s definitely going to take some getting used to, but so far I can say that the display is gorgeous and for the most part the functionality is wicked fast.

Music applications for Android under development include TouchOSC, and I’ve read several articles on CDM highlighting others that are available or in progress. I’m curious about Android music or sound based projects and applications that are either currently available or under development. Please comment if you’ve encountered articles or examples on this topic. After doing some research, perhaps I can start experimenting with some of the apps and writing about them here on ACB. Thanks!

GMS Video Experiment with Reason

Posted on December 22, 2009 by John C.S. Keston

GMS Video Experiment w/ Reason from Dane Messall on Vimeo.

My student, Dane Messall, has been experimenting with the GMS over the break and just posted this video experiment. He imported the video into the GMS and then interfaced it with Reason’s Thor synthesizer to generate the sound. Nice one, Dane!

Almost 300 GMS Downloads, Responses Needed

Posted on December 11, 2009 by John C.S. Keston

ods_session As the GMS approaches three-hundred downloads, I’m starting to get a few questions regarding technical problems. It’s exciting that people are starting to use my software, but as an individual developer, who is also a composer, instructor, performer, and student, I don’t have time to diagnose and troubleshoot every problem on every system.

Therefore, I am asking for your help. If you have downloaded the GMS, please post a comment here describing your success stories or problems. In either instance, please include details about your environment including the operating system, computer specs, camera in use, and if you’re using internal or external sync.

I’ll do my best to respond to Mac issues, but I don’t have consistent access to Windows. If you’re up and running on Windows please respond to questions if you have ideas on how to fix the problem. As always, I’m interested in hearing what you do with the GMS, so post a link to your tracks, and thanks to everyone for participating.

GMS Now Available for Windows

Posted on December 5, 2009 by John C.S. Keston

GMS v0.10 beta binary distribution for Windows is now available, thanks to Grant Muller, who compiled the latest source code for the GMS under Windows. Please visit the GMS page to download the Windows version. If you’re interested in the source code for the GMS you can find it at http://code.google.com/p/gestural-music-sequencer/.

Live Music by John Keston at the WBSC

Posted on December 4, 2009 by John C.S. Keston

wbsc_js This Wednesday, December 9, 2009, 7pm – 10pm I’ll be performing music at the West Bank Social Center. The space can be found above the Nomad Bar, 501 Cedar Avenue South, Minneapolis, Minnesota, and is accessible by an exterior door on the north side of the building. These events are entertaining mash-ups of creative ideas from a variety of artists producing interactive projection pieces. Checkout the video documentation from the last event where I played. I’ll probably be using a combination of vintage Hammond organ through laptop, gestural generative sequencing, and custom grain table madness, all arranged in real-time in Ableton Live.