D2 — 73.416 Hz
D2 (D2) is 73.416 Hz in standard equal temperament at A=440 Hz. It is MIDI note number 38.
D2 Frequency in All Tuning Systems
| Temperament | Frequency (Hz) | Cents from Equal | Common Usage |
|---|---|---|---|
| Equal Temperament | 73.416 Hz | 0.00 | Modern standard; piano, fretted instruments |
| Pythagorean Tuning | 73.333 Hz | -1.96 | Medieval/early music; string ensemble open fifths |
| Just / Pure | 73.582 Hz | +3.91 | A cappella vocal, barbershop, Renaissance |
| Meantone 1/3 Comma | 73.637 Hz | +5.20 | Renaissance vocal music in minor keys |
| Meantone 1/4 Comma | 73.561 Hz | +3.42 | Renaissance keyboard, early Baroque organ |
| 1/6 SC - Attenuated | 73.499 Hz | +1.96 | Baroque orchestral ensemble compromise |
| Kellner's Bach | 73.549 Hz | +3.13 | Bach keyboard reconstruction |
| Kirnberger III | 73.561 Hz | +3.42 | Classical-era keyboard, keys near C major |
| Vallotti | 73.499 Hz | +1.96 | Baroque/Classical orchestral tuning |
| Werckmeister III | 73.582 Hz | +3.91 | Baroque keyboard; Bach contemporaries |
| Werckmeister IV | 73.582 Hz | +3.91 | Baroque keyboard, strong key contrast |
| Werckmeister V | 73.749 Hz | +7.83 | Specialized Baroque keyboard |
Positive cents = sharper than equal temperament. Negative cents = flatter. 100 cents = 1 semitone.
D2 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) | 73.416 Hz | US, UK, and most modern ensembles worldwide |
| A = 442 Hz | 73.750 Hz | Many European orchestras; France, Germany |
| A = 443 Hz | 73.917 Hz | Berlin Philharmonic; some US orchestras |
| A = 432 Hz | 72.081 Hz | Alternative tuning; Baroque revival |
| A = 415 Hz (Baroque) | 69.245 Hz | Historically-informed Baroque performance |
f = f_at_A440 × (concert_pitch / 440)
Instruments That Play D2
D2 (73.416 Hz) falls within the comfortable playing range of 18 instruments.
D2 Across All Tuning Systems
Explore how D2 is tuned in each historical temperament system. Each tuning system gives D2 a slightly different frequency, affecting the harmonic character of chords and melodies.
D2 in Historical Temperament Systems
Explore how D2 (73.416 Hz in equal temperament) is tuned in each of the 15 historical non-equal temperament systems. Each system places D2 at a slightly different frequency based on its mathematical basis.
Tune D2 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.
