- Bedrock Type
- Bedrock Age
- Surface Covering
- Surface Covering Depth
- Gravity anomaly (which is a measure of the density of rock beneath the surface)
Mappings, interaction and control
- Sedimentary rocks are noisy, percussive sounds
- Metamorphic rocks are a saw wave
- Igneous rocks are represented by a resonant filtered oscillator.
- Rock chemistry (mafc to felisc) determines note overdrive
- Grain size determines tremolo or modulation for sedimentary rocks. This is represented as different shades of blue on the Rock Type map.
- The metamorphic grade of a rock (represented as different shades of green) determines granular pitch randomness.
- Faults produce record skip-like sounds whenever a playhead crosses one.
- Surficial Geology (the surface “stuff” that covers the bedrock) determines the lengthand feedback of a delay or echo.
- Lastly, isostatic gravity anomaly determines the attack and decay characteristics of the notes.
Areas outside the state or in the ocean will not produce sound. The video below shows how the software works.
The software is free to download here and includes a tutorial to get started.
Tomayko has used this software in a performative setting. It was commissioned by Swissnex Boston for the opening on June 4, 2013, of Swiss Style Reboot – a show of Swiss style infographics at Northeastern University. He has since then regularly performed with it.
About Arvid Tomayko and related work
Arvid Tomayko is a composer working in the field of electronic and experimental music. He creates his won instruments, music software and performs live, and includes real-time graphics. You can buy his work on Bandcamp.
Massachusetts Geophonic is part of his sonification practice, which includes works such as Maestro Frankenstein, a sonification toolbox, and Climate Controlled, an interactive installation that sonifies the climate evolution over 5 million years. I will write about these works in detail in separate posts.