Frequency Modulated Drone Generator

Posted on May 9, 2010 by John CS Keston

I’m currently working on a sound design project for a client who is looking for a way to generate specific sorts of sounds using easy to understand controls. I started by creating a frequency modulated drone generator. The tool has a mixer with six preset pitches plus noise. I also included amplitude modulation, with sliders to control the amount, LFO, and a frequency multiplier to allow for FM synthesis effects. Here’s an audio example that illustrates the range of sounds possible with this set of fairly simple and intuitive controls.

Drone Tool Example

Experimental Music Mondays: Ephemeral Structures

Posted on April 26, 2010 by John CS Keston

This Monday, April 26, 2010 is the third installment of Experimental Music Mondays at the Kitty Cat Klub in Minneapolis, Minnesota. The line-up includes violin soloist Kip Jones, Ephemeral Structures, and Primidonahue (Michael Donahue). The music will start at around 9:00pm and there’s no cover to get into the club.

Yesterday afternoon I had a fantastic session with Ephemeral Structures. Although we have all worked with each other in several capacities, this is only the second time the group has performed in eight years. The result of yesterday’s session were pretty inspiring, so we are considering producing an album. The project includes Kyle Herskovitz (also know as DJ Zenrock) on turntables, Nils Westdal on bass and electronics, and me on electronics. The photo shows Kyle playing his turntable with a rubber band. I’ll share a segment of what we captured in a upcoming entry.

Notice to Mac OS X 10.5 GMS Users

Posted on April 22, 2010 by John CS Keston

After installing Java for Mac OS X 10.5 Update 6 I discovered that the GMS wasn’t transmitting MIDI signals to Ableton Live via the IAC drivers. I updated the mmj drivers and noticed that two versions of the MIDI in/out devices showed up in the drop down menus. I removed the mmj drivers and found that they are no longer necessary. This is makes it a little easier to install and configure the GMS to work with Ableton Live, Reason, or other applications. If you’re running the GMS under Mac OS X 10.6 it might be worth trying the latest version of Java for Mac with the GMS v0.11. If anyone gives this a try, please let me know if it works.

POSC Pocket Oscillator

Posted on April 19, 2010 by John CS Keston

This weekend I built a POSC Pocket Oscillator by Sonodrome as a prototype sound design element for an interactive dance collaboration. The circuit is incredibly simple, as you can see by the photo, but the variety of sounds possible with the two pulse wave oscillators is impressive. The first oscillator is controlled by by the players skin resistance between two zinc plated contacts, while the second is controlled by an LDR (light dependent resistor). Rather than running independently the first oscillation modulates the second.

After testing the build, I temporarily setup the POSC in a small cardboard box and started making sounds. During one test I found that a circuit could be made with two people. when one person touches one contact and a second person touches the other, then the people touch each other the circuit is made with a lot of resistance creating a much slower pulse. Here’s an unprocessed sample edited out of my initial experimentation.

POSC Sample

Sound Crawl 2010

Posted on April 19, 2010 by John CS Keston

This Friday, April 23, 2010 at around midnight I am very excited to be performing a rare solo set at McNally Smith under my Ostraka moniker.

I’ll be using a number of custom developed tools, including the GMS and my tentatively titled WTGM (Wave-Table Glitch Machine).

The event is called Sound Crawl and is being billed as “the official sound track for Art Crawl”.

Other artists include James Patrick and Timefog, Oliver Grudem, and Minneapolis Art on Wheels. More information and a complete schedule is available at:

http://blog.mcnallysmith.edu/soundcrawl/2010-schedule/