A = 440.00 Hz (Concert Pitch) 歌词
| 歌曲 | A = 440.00 Hz (Concert Pitch) |
| 歌手 | Tuning Tones |
| 专辑 | Standard Concert Pitch: Specific Frequencies for Instrument Tuning |
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| 歌曲 | A = 440.00 Hz (Concert Pitch) |
| 歌手 | Tuning Tones |
| 专辑 | Standard Concert Pitch: Specific Frequencies for Instrument Tuning |