Pure Sine Wave 1000Hz One Hour

$1.50

Pure Sine Wave 1000Hz One Hour

Description

Pure sine wave 1000Hz is a common tone used in broadcast as a test tone and a ‘please stand by’ or ‘off the air tone’ in the 20th Century. The Sine wave has no overtones so it is sometime called pure as it is only the fundamental frequency. One hour 320kbps mp3 format

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