639 Hz — Nearest Note: D#5 / Eb5
639 Hz is closest to D#5 / Eb5 in equal temperament at A=440 Hz. The deviation is +45.97 cents (sharp of the nearest equal-tempered pitch).
639 Hz is associated with the Solfeggio frequency scale, a set of tones used in certain alternative wellness and music communities. Its nearest musical pitch in equal temperament at A=440 Hz is D#5.
Multi-Temperament Context for D#5 / Eb5
The table below shows how D#5 / Eb5 is tuned in all 16 temperaments at A=440 Hz, and how far 639 Hz falls from each.
| Temperament | Hz (A=440) | vs Equal Temp (cents) | Distance from 639 Hz (cents) |
|---|---|---|---|
| Equal Temperament | 622.254 Hz | 0.00 | +45.97 |
| Pythagorean | 618.052 Hz | -11.73 | +57.71 |
| Just Intonation (Major) | 627.901 Hz | +15.64 | +30.33 |
| Just Intonation (Minor) | 627.901 Hz | +15.64 | +30.33 |
| Quarter-Comma Meantone | 629.677 Hz | +20.53 | +25.44 |
| Third-Comma Meantone | 632.170 Hz | +27.37 | +18.60 |
| Sixth-Comma Meantone | 627.194 Hz | +13.69 | +32.29 |
| Werckmeister III | 627.194 Hz | +13.69 | +32.29 |
| Werckmeister IV | 622.959 Hz | +1.96 | +44.01 |
| Werckmeister V | 623.661 Hz | +3.91 | +42.06 |
| Kirnberger III | 627.194 Hz | +13.69 | +32.29 |
| Vallotti | 625.071 Hz | +7.82 | +38.16 |
| Young (1799) | 625.779 Hz | +9.78 | +36.20 |
| Bach/Lehman | 623.661 Hz | +3.91 | +42.06 |
| Neidhardt | 623.661 Hz | +3.91 | +42.06 |
| Kellner (Bach) | 626.343 Hz | +11.34 | +34.64 |
Positive cents = 639 Hz is sharp of the temperament pitch. Negative = flat. The "Distance from 639 Hz" column answers: in which temperament does 639 Hz come closest to D#5 / Eb5?
Chromatic Neighbors
The notes immediately below and above D#5 / Eb5 on the chromatic scale (in equal temperament at A=440 Hz):
See full frequency data for D#5 / Eb5.
Adjacent Frequencies in This Index
Other commonly-searched frequencies near 639 Hz:
Instruments That Play D#5 / Eb5
D#5 / Eb5 (622.254 Hz) falls within the comfortable playing range of 43 instruments.
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