Category Archives: Art

Art Code Voice of Sisyphus

VOS going to Shanghai

vos

Voice of Sisyphus will be shown at the Chronus Art Center in Shanghai starting in June. I developed the compositional software which controls the piece.

Art Code

Harold Cohen’s Coloring Algorithm in C++

Harold Cohen’s coloring formula is a heuristic method by which to probabilistically control randomly generated color saturation, and lightness values.It has been used extensively by his AARON algorithmic painter, and is summarized in detail in the essay “Color, Simply,” 2006. I ported the algorithm into a C++ as a class which you can download here (relies on AlloCore currently. A standalone version is soon to come).
The algorithm can be described as follows:

  1. Three normalized number ranges are chosen, corresponding to low, medium, and high values. For example 0.15-0.35 (L), 0.4-0.65 (M), 0.8-1.0 (H)
  2. These are set up in a 3×3 matrix, each corresponding to a possible saturation-lightness pairing. For example, a low-low (LL) pairing would provide both saturation and lightness values chosen randomly from within the low range
  3. During initialization, a probability value is assigned to each of the 9 pairing possibilities inside of this matrix. Cohen suggests only using 2-3 of them per composition, for example: 20%-LL, 40%-HL, and 40%-MH
  4. When a new color is desired, one of these range pairs is selected based on its assigned probability, and then a specific saturation-lightness pair is chosen randomly from within each of the selected pair’s ranges.
Art Music Voice of Sisyphus

Voice of Sisyphus at Nature Morte Gallery, Berlin

Art Drip Music

Drip at Soundwalk, Long Beach

Last Saturday we showed Drip at the 2012 Soundwalk outdoor music festval in Long Beach, CA. The audience seemed to really engage with it and we heard lots of great feedback. In the past we’ve only installed it outside, so this was a pretty strange experience. A puddle quickly gathered on the floor and looked quite dangerous with all the power cables running everywhere, so a few people were too scared to go near it! Most just came right up and started playing though. This is one of the videos that was taken- unfortunately whoever shot it didn’t realize that the piece is a collaboration with Muhammad Hafiz so his name wasn’t included in the credits.

Here are a couple photos from the show:

Art Code Drip Music

Drip: a Water Powered Sound Installation

I created this piece in collaboration with the new media artist Muhammad Hafiz Wan Rosli this spring. It was featured in the UCSB Media Art and Technology Program’s “Bits and Pieces” Exhibition back in May and we’ll also be showing it on September 1st at the Soundwalk Festival in Longbeach.

This is a technical description from the Soundwalk proposal:

“Drip is an interactive sound sculpture consisting of 16 tuned metal bars hung from a 3” by 3” by 5” high (freestanding) iron frame. Attached to the frame above each bar are solenoid water valves that can be triggered by an Arduino microcontroller. As the valves are opened and closed, drops of water pass through them falling onto each of the sixteen bars. The resulting sound is acoustically amplified through attached piezoelectric microphones. This action of falling water produces rhythms and melodies which are sequenced in real time and which can be altered by the audience’s interaction via light sensors embedded in the piece. Since all sound is generated acoustically, viewers can also interact with the piece by directly tapping the bars or plucking the nylon wire that suspends them in the air. The resulting soundscape is something like a surrealist version of rain falling on a tin roof or a collection of gongs being struck in chaotic mathematical patterns.”

Art Code Music

Standing Waves

“Standing Waves” is an interactive multimedia installation based off of a 3D implementation of the universal wave equation. Motion-tracking controllers allow the audience to physically “drag” waves through the virtual pool. A system of oscillators hidden beneath these waves is used to sonify the amount of energy at each region of the system. Because each oscillator is tuned to a different frequency, participants can hear energy propagate throughout the system as they interact with it.

The piece was created with Processing using the glGraphics, PeasyCam, and minim libraries.

Art Code Music Voice of Sisyphus

Voice of Sisyphus Presented at ICAD

On June 19th I gave a talk with my colleague Ryan McGee at the 2012 International Community for Auditory Display (ICAD), hosted by Georgia Tech. Our presentation was about image sonification (turning pixels into sound) and a piece we created using this technique called “Voice of Sisyphus.”  Here’s a link to the white paper: Voice of Sisyphus: an Image Sonifcation Multimedia Installation

Voice of Sisyphus is a multimedia installation created in conjunction with Ryan McGee under the artistic direction of George Legrady. It opens at Nature Morte Gallery, Berlin on September 7th, 2012 and was displayed at the Edward Cella Gallery, Los Angeles November 2011 – February 2012.