C = 261.63 Hz (Middle C) Lyrics
| Song | C = 261.63 Hz (Middle C) |
| Artist | Tuning Tones |
| Album | Standard Concert Pitch: Specific Frequencies for Instrument Tuning |
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| Song | C = 261.63 Hz (Middle C) |
| Artist | Tuning Tones |
| Album | Standard Concert Pitch: Specific Frequencies for Instrument Tuning |