art
Sine Wave A 440 Hz Concert Pitch for Ten Hours
Stop your brain from overthinking. You don't need an app. Ten hour Sine wave with no overtones which is called pure as it is only the fundamental frequency.
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Recorded in 1980 at Filmstudio Amsterdam, is part of the That Self series and engages with the first acceptance of performance, when understood as a body test that can lead to endangering life. The arrowhead was pointing at Abramovic's heart, creating a dense tension. Microphones on their clothes picked up their quickening heartbeats and irregular breathing.