B1 — 61.735 Hz
B1 (B1) is 61.735 Hz in standard equal temperament at A=440 Hz. It is MIDI note number 35.
B1 Frequency in All Tuning Systems
| Temperament | Frequency (Hz) | Cents from Equal | Common Usage |
|---|---|---|---|
| Equal Temperament | 61.735 Hz | 0.00 | Modern standard; piano, fretted instruments |
| Pythagorean Tuning | 61.875 Hz | +3.92 | Medieval/early music; string ensemble open fifths |
| Just / Pure | 61.318 Hz | -11.73 | A cappella vocal, barbershop, Renaissance |
| Meantone 1/3 Comma | 61.388 Hz | -9.76 | Renaissance vocal music in minor keys |
| Meantone 1/4 Comma | 61.492 Hz | -6.83 | Renaissance keyboard, early Baroque organ |
| 1/6 SC - Attenuated | 61.561 Hz | -4.89 | Baroque orchestral ensemble compromise |
| Kellner's Bach | 61.624 Hz | -3.12 | Bach keyboard reconstruction |
| Kirnberger III | 61.614 Hz | -3.40 | Classical-era keyboard, keys near C major |
| Vallotti | 61.596 Hz | -3.90 | Baroque/Classical orchestral tuning |
| Werckmeister III | 61.666 Hz | -1.94 | Baroque keyboard; Bach contemporaries |
| Werckmeister IV | 61.526 Hz | -5.87 | Baroque keyboard, strong key contrast |
| Werckmeister V | 61.805 Hz | +1.96 | Specialized Baroque keyboard |
Positive cents = sharper than equal temperament. Negative cents = flatter. 100 cents = 1 semitone.
B1 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) | 61.735 Hz | US, UK, and most modern ensembles worldwide |
| A = 442 Hz | 62.016 Hz | Many European orchestras; France, Germany |
| A = 443 Hz | 62.156 Hz | Berlin Philharmonic; some US orchestras |
| A = 432 Hz | 60.613 Hz | Alternative tuning; Baroque revival |
| A = 415 Hz (Baroque) | 58.228 Hz | Historically-informed Baroque performance |
f = f_at_A440 × (concert_pitch / 440)
Instruments That Play B1
B1 (61.735 Hz) falls within the comfortable playing range of 13 instruments.
Why B1 Varies Across Tuning Systems
B1 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, B1 is tuned flatter than equal temperament, reflecting this system's approach to distributing the Pythagorean comma across the chromatic scale.
B1 Across All Tuning Systems
Explore how B1 is tuned in each historical temperament system. Each tuning system gives B1 a slightly different frequency, affecting the harmonic character of chords and melodies.
B1 in Historical Temperament Systems
Explore how B1 (61.735 Hz in equal temperament) is tuned in each of the 15 historical non-equal temperament systems. Each system places B1 at a slightly different frequency based on its mathematical basis.
Tune B1 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.
