Spectral Tablature (2013)

Posted on May 13, 2013 by John C.S. Keston

Spectral Tablature is a series of collaborative installations that explore sound generated through visual processes. Sound is recorded or synthesized using common techniques then converted into images called spectral analysis. These forms are re-interpreted as a visual artifact then converted back into sound. For each pair, or “duet,” the similarities and differences in tone and texture can be heard as well as seen in the work. This series, along with two more of my installations, is currently on display for my thesis exhibition at the Northrup King Building in Minneapolis. Please read on for images and descriptions of each pair of prints along with the audio.
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Post-prepared Piano Animated Sequence

Posted on January 15, 2013 by John C.S. Keston

I put together this animated sequence of the media from Post-prepared Piano to illustrate the relationships between the spectral analysis, the mapping with nails and twine, and the music from the piece. Thanks to Photosounder developer Michel Rouzic for suggesting that I make a video combining the sound and imagery after seeing the documentation I posted a few days ago.

Post-prepared Piano by John Keston and Piotr Szyhalski

Posted on January 13, 2013 by John C.S. Keston

Piotr Szyhalski and I have just finished installing a piece titled, Post-prepared Piano, in the Burnet Gallery at Le Méridien Chambers, Minneapolis. Our installation is part of a show called Interactions and features the work of select MCAD MFA students in collaboration with their mentors. Our piece consists of several components. The first part is a 14′ wide and 17″ tall inkjet print of spectral analysis from a short piano composition that I performed and recorded using my custom built, binaural head microphone (otherwise known as Vincent).

Below the print is an installation that Szyhalski constructed from tarpaper, nails, and one continuous piece of twine. This handmade mapping of the spectral analysis was then photographed and converted back into sound using Michel Rouzic’s excellent application, Photosounder. Thirdly, we installed an iPad with headphones that allows the visitors to hear the original recording, the nails and string version, and a combination of the two layered on top of one another (visit the tablet optimized webapp). The show opens today and runs through February 24, 2013 with an artist’s reception on January 31 from 6pm to 9pm. Read on for more details, photos and sounds. Continue reading →

Excerpt from Ostraka Improvisation at NAMAC 2012

Posted on September 10, 2012 by John C.S. Keston

This excerpt is from my first live performance featuring the DSI Tempest last Thursday, September 6, 2012 at the Walker Art Center for the NAMAC opening night reception. My setup consisted of the Tempest synched up with a Korg Monotribe. The notes and some of the drums patterns were created in real-time with the GMS creating those signature, angular lines. I also played percussion patterns into the Tempest sequencer during the performance. The entire 75 minute set was improvised. LEDs fed into the video camera were projected on the wall behind me and used to generated the melodic and some of the rhythmic content.

Eyeo: Using Digital Imagery to Generate Sound

Posted on February 27, 2012 by John C.S. Keston

The first ever Eyeo Festival was last June and the second iteration looks to be just as amazing as the last. Here’s a video of a presentation that I gave at Eyeo last year on using digital imagery to generate sound. I also have the HTML5 slideshow available (use the left and right arrow keys to navigate). A big thanks goes out to Dave Schroeder for creating Eyeo and sharing these videos.