E7 — 2637.020 Hz
E7 (E7) is 2637.020 Hz in standard equal temperament at A=440 Hz. It is MIDI note number 100.
E7 Frequency in All Tuning Systems
| Temperament | Frequency (Hz) | Cents from Equal | Common Usage |
|---|---|---|---|
| Equal Temperament | 2637.020 Hz | 0.00 | Modern standard; piano, fretted instruments |
| Pythagorean | 2640.008 Hz | +1.96 | Medieval/early music; string ensemble open fifths |
| Just Intonation (Major) | 2616.256 Hz | -13.69 | A cappella vocal, barbershop, Renaissance |
| Just Intonation (Minor) | 2616.256 Hz | -13.69 | Minor-key vocal music, string ensembles |
| Quarter-Comma Meantone | 2631.816 Hz | -3.42 | Renaissance keyboard, early Baroque organ |
| Third-Comma Meantone | 2631.816 Hz | -3.42 | Renaissance vocal music in minor keys |
| Sixth-Comma Meantone | 2631.816 Hz | -3.42 | Baroque orchestral ensemble compromise |
| Werckmeister III | 2634.037 Hz | -1.96 | Baroque keyboard; Bach contemporaries |
| Werckmeister IV | 2631.071 Hz | -3.91 | Baroque keyboard, strong key contrast |
| Werckmeister V | 2634.037 Hz | -1.96 | Specialized Baroque keyboard |
| Kirnberger III | 2631.816 Hz | -3.42 | Classical-era keyboard, keys near C major |
| Vallotti | 2634.037 Hz | -1.96 | Baroque/Classical orchestral tuning |
| Young (1799) | 2634.037 Hz | -1.96 | Classical-era keyboard |
| Bach/Lehman | 2634.037 Hz | -1.96 | Bach keyboard works, Well-Tempered Clavier |
| Neidhardt | 2634.037 Hz | -1.96 | 18th century keyboard, near-equal alternative |
| Kellner (Bach) | 2632.257 Hz | -3.13 | Bach keyboard reconstruction |
Positive cents = sharper than equal temperament. Negative cents = flatter. 100 cents = 1 semitone.
E7 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) | 2637.020 Hz | US, UK, and most modern ensembles worldwide |
| A = 442 Hz | 2649.007 Hz | Many European orchestras; France, Germany |
| A = 443 Hz | 2655.000 Hz | Berlin Philharmonic; some US orchestras |
| A = 432 Hz | 2589.075 Hz | Alternative tuning; Baroque revival |
| A = 415 Hz (Baroque) | 2487.190 Hz | Historically-informed Baroque performance |
f = f_at_A440 × (concert_pitch / 440)
Instruments That Play E7
E7 (2637.020 Hz) falls within the comfortable playing range of 3 instruments.
Why E7 Varies Across Tuning Systems
E7 shows a maximum deviation of -13.69 cents in Just Intonation (Major) compared to equal temperament. This 14-cent difference reflects how different tuning philosophies prioritize interval purity over equal distribution.
In Just Intonation (Major), E7 is tuned flatter than equal temperament, reflecting this system's approach to distributing the Pythagorean comma across the chromatic scale.
2 of the 15 non-equal temperaments deviate by more than 10 cents for E7, making this note one where tuning system choice has a meaningful impact on pitch.
E7 Across All Tuning Systems
Explore how E7 is tuned in each historical temperament system. Each tuning system gives E7 a slightly different frequency, affecting the harmonic character of chords and melodies.
Tune E7 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.