The Tidal Observation Instrument brings tides from around the globe into the audible range and allows their tones to mix and mingle.
Daniel Fries
https://www.youtube.com/watch?v=nQQ2tiA1xrE
Description
The Tidal Observation Instrument starts with four tides. It uses historical data from the International Oceanographic Commission to log those tides as wavetables, and allows an instrumentalist to control the speed of the signal, from the native tidal frequency of 0.0000016Hz up to a more typical Low-Frequency Oscillator range of 0.01Hz. This LFO is allowed to modulate a sample of the waveform playing at 440Hz (Concert A). As the four tides play, it's possible to hear the last several days of tides across the globe resonate with each other, leading towards a strange new metaphor for the waves.
ITPG-GT.2040.001
Time
Sound,Art