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Listen to and see piano key: Low D Narrator: Timelessreader1 Photographer: Timelessreader1 Pianist: Timelessreader1.
36,771 views
12 years ago
A "D" note, 587.33 hz sine wave, for tuning and reference purposes. You may want to turn down the volume if there is distortion, ...
888,183 views
13 years ago
