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
This is a serious musical instrument. It rotates everyday things, scans their surfaces, and transforms them into audible frequencies. A variety of everyday objects can be mounted into the instrument. Their silhouettes define loops, melodies and rhythms. Thus mundane things are reinterpreted as musical notation. The instrument was built from aluminum tubes, white POM, black acrylic glass, a high precision distance measuring laser, a stepper motor, and a few bits and bobs by Dennis P Paul.