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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.
Youtube
An original short documentary featuring stories from one of the most dangerous years on record for New York City. Featuring Guardian Angels founder Curtis Sliwa, performance artist and former Warhol Factory fixture Penny Arcade, actress Johnnie Mae, Harlem street-style legend Dapper Dan, auto body shop owner Nick Rosello, and trucking union rep Wayne Walsh.