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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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Tune into this private moment of performance and pain, as a grief striken musician seeks solace in his viola. The frenzied classical performance reaches a bloodied crescendo with the destruction of the instrument. Performed by Tobie Tripp. Composed by Joss Holden-Rea.