D0 — 18.354 Hz
D0 (D0) is 18.354 Hz in standard equal temperament at A=440 Hz. It is MIDI note number 14.
D0 Frequency in All Tuning Systems
| Temperament | Frequency (Hz) | Cents from Equal | Common Usage |
|---|---|---|---|
| Equal Temperament | 18.354 Hz | 0.00 | Modern standard; piano, fretted instruments |
| Pythagorean | 18.333 Hz | -1.98 | Medieval/early music; string ensemble open fifths |
| Just Intonation (Major) | 18.396 Hz | +3.96 | A cappella vocal, barbershop, Renaissance |
| Just Intonation (Minor) | 18.396 Hz | +3.96 | Minor-key vocal music, string ensembles |
| Quarter-Comma Meantone | 18.390 Hz | +3.39 | Renaissance keyboard, early Baroque organ |
| Third-Comma Meantone | 18.409 Hz | +5.18 | Renaissance vocal music in minor keys |
| Sixth-Comma Meantone | 18.375 Hz | +1.98 | Baroque orchestral ensemble compromise |
| Werckmeister III | 18.396 Hz | +3.96 | Baroque keyboard; Bach contemporaries |
| Werckmeister IV | 18.396 Hz | +3.96 | Baroque keyboard, strong key contrast |
| Werckmeister V | 18.437 Hz | +7.81 | Specialized Baroque keyboard |
| Kirnberger III | 18.390 Hz | +3.39 | Classical-era keyboard, keys near C major |
| Vallotti | 18.375 Hz | +1.98 | Baroque/Classical orchestral tuning |
| Young (1799) | 18.375 Hz | +1.98 | Classical-era keyboard |
| Bach/Lehman | 18.375 Hz | +1.98 | Bach keyboard works, Well-Tempered Clavier |
| Neidhardt | 18.375 Hz | +1.98 | 18th century keyboard, near-equal alternative |
| Kellner (Bach) | 18.387 Hz | +3.11 | Bach keyboard reconstruction |
Positive cents = sharper than equal temperament. Negative cents = flatter. 100 cents = 1 semitone.
D0 at Different Concert Pitches
The same note varies in frequency depending on the concert pitch standard used by your ensemble.
| Concert Pitch | Frequency (Hz) | Common Usage |
|---|---|---|
| A = 440 Hz (ISO standard) | 18.354 Hz | US, UK, and most modern ensembles worldwide |
| A = 442 Hz | 18.437 Hz | Many European orchestras; France, Germany |
| A = 443 Hz | 18.479 Hz | Berlin Philharmonic; some US orchestras |
| A = 432 Hz | 18.020 Hz | Alternative tuning; Baroque revival |
| A = 415 Hz (Baroque) | 17.311 Hz | Historically-informed Baroque performance |
f = f_at_A440 × (concert_pitch / 440)
D0 Across All Tuning Systems
Explore how D0 is tuned in each historical temperament system. Each tuning system gives D0 a slightly different frequency, affecting the harmonic character of chords and melodies.
Tune D0 with precision — Get Tunable.
Tunable supports 15+ tuning systems including equal temperament, Pythagorean, just intonation, and historical well-temperaments. See exact Hz values in real-time as you play.