D1 — 36.708 Hz
D1 (D1) is 36.708 Hz in standard equal temperament at A=440 Hz. It is MIDI note number 26.
D1 Frequency in All Tuning Systems
| Temperament | Frequency (Hz) | Cents from Equal | Common Usage |
|---|---|---|---|
| Equal Temperament | 36.708 Hz | 0.00 | Modern standard; piano, fretted instruments |
| Pythagorean | 36.667 Hz | -1.93 | Medieval/early music; string ensemble open fifths |
| Just Intonation (Major) | 36.791 Hz | +3.91 | A cappella vocal, barbershop, Renaissance |
| Just Intonation (Minor) | 36.791 Hz | +3.91 | Minor-key vocal music, string ensembles |
| Quarter-Comma Meantone | 36.781 Hz | +3.44 | Renaissance keyboard, early Baroque organ |
| Third-Comma Meantone | 36.819 Hz | +5.23 | Renaissance vocal music in minor keys |
| Sixth-Comma Meantone | 36.750 Hz | +1.98 | Baroque orchestral ensemble compromise |
| Werckmeister III | 36.791 Hz | +3.91 | Baroque keyboard; Bach contemporaries |
| Werckmeister IV | 36.791 Hz | +3.91 | Baroque keyboard, strong key contrast |
| Werckmeister V | 36.874 Hz | +7.81 | Specialized Baroque keyboard |
| Kirnberger III | 36.781 Hz | +3.44 | Classical-era keyboard, keys near C major |
| Vallotti | 36.750 Hz | +1.98 | Baroque/Classical orchestral tuning |
| Young (1799) | 36.750 Hz | +1.98 | Classical-era keyboard |
| Bach/Lehman | 36.750 Hz | +1.98 | Bach keyboard works, Well-Tempered Clavier |
| Neidhardt | 36.750 Hz | +1.98 | 18th century keyboard, near-equal alternative |
| Kellner (Bach) | 36.775 Hz | +3.16 | Bach keyboard reconstruction |
Positive cents = sharper than equal temperament. Negative cents = flatter. 100 cents = 1 semitone.
D1 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) | 36.708 Hz | US, UK, and most modern ensembles worldwide |
| A = 442 Hz | 36.875 Hz | Many European orchestras; France, Germany |
| A = 443 Hz | 36.958 Hz | Berlin Philharmonic; some US orchestras |
| A = 432 Hz | 36.041 Hz | Alternative tuning; Baroque revival |
| A = 415 Hz (Baroque) | 34.622 Hz | Historically-informed Baroque performance |
f = f_at_A440 × (concert_pitch / 440)
Instruments That Play D1
D1 (36.708 Hz) falls within the comfortable playing range of 7 instruments.
D1 Across All Tuning Systems
Explore how D1 is tuned in each historical temperament system. Each tuning system gives D1 a slightly different frequency, affecting the harmonic character of chords and melodies.
Tune D1 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.