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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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“Perhaps besides San Fransisco, Rio or Cape Town, not many metropolises have the geographical attributes of an urban downhill like the crusty slopes of Hong Kong. Join the journey from Peak to Pier with Xander Yeadon being chased by Patrik Wallner and his trusty VX1000 on this project for Victoria hk 🇭🇰🏔⛴