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.
Youtube
Over than 3500 km traveled in 20 days, capturing landscapes from the bluish tones of Pamukkale to the warm ones of Cappadocia, the all passing by a great variation of colors, lights and weathers through six other cities. Directed and edited by Leonardo Dalessandri. Soundtrack "Experience" by Ludovico Einaudi.