B7 — 3951.066 Hz
B7 (B7) is 3951.066 Hz in standard equal temperament at A=440 Hz. It is MIDI note number 107.
B7 Frequency in All Tuning Systems
| Temperament | Frequency (Hz) | Cents from Equal | Common Usage |
|---|---|---|---|
| Equal Temperament | 3951.066 Hz | 0.00 | Modern standard; piano, fretted instruments |
| Pythagorean Tuning | 3960.000 Hz | +3.91 | Medieval/early music; string ensemble open fifths |
| Just / Pure | 3924.383 Hz | -11.73 | A cappella vocal, barbershop, Renaissance |
| Meantone 1/3 Comma | 3928.809 Hz | -9.78 | Renaissance vocal music in minor keys |
| Meantone 1/4 Comma | 3935.464 Hz | -6.85 | Renaissance keyboard, early Baroque organ |
| 1/6 SC - Attenuated | 3939.922 Hz | -4.89 | Baroque orchestral ensemble compromise |
| Kellner's Bach | 3943.929 Hz | -3.13 | Bach keyboard reconstruction |
| Kirnberger III | 3943.269 Hz | -3.42 | Classical-era keyboard, keys near C major |
| Vallotti | 3942.153 Hz | -3.91 | Baroque/Classical orchestral tuning |
| Werckmeister III | 3946.596 Hz | -1.96 | Baroque keyboard; Bach contemporaries |
| Werckmeister IV | 3937.692 Hz | -5.87 | Baroque keyboard, strong key contrast |
| Werckmeister V | 3955.542 Hz | +1.96 | Specialized Baroque keyboard |
Positive cents = sharper than equal temperament. Negative cents = flatter. 100 cents = 1 semitone.
B7 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) | 3951.066 Hz | US, UK, and most modern ensembles worldwide |
| A = 442 Hz | 3969.026 Hz | Many European orchestras; France, Germany |
| A = 443 Hz | 3978.005 Hz | Berlin Philharmonic; some US orchestras |
| A = 432 Hz | 3879.229 Hz | Alternative tuning; Baroque revival |
| A = 415 Hz (Baroque) | 3726.574 Hz | Historically-informed Baroque performance |
f = f_at_A440 × (concert_pitch / 440)
Instruments That Play B7
B7 (3951.066 Hz) falls within the comfortable playing range of 3 instruments.
Why B7 Varies Across Tuning Systems
B7 shows a maximum deviation of -11.73 cents in Just / Pure compared to equal temperament. This 12-cent difference reflects how different tuning philosophies prioritize interval purity over equal distribution.
In Just / Pure, B7 is tuned flatter than equal temperament, reflecting this system's approach to distributing the Pythagorean comma across the chromatic scale.
B7 Across All Tuning Systems
Explore how B7 is tuned in each historical temperament system. Each tuning system gives B7 a slightly different frequency, affecting the harmonic character of chords and melodies.
B7 in Historical Temperament Systems
Explore how B7 (3951.066 Hz in equal temperament) is tuned in each of the 15 historical non-equal temperament systems. Each system places B7 at a slightly different frequency based on its mathematical basis.
Tune B7 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.
