Gb2 — 92.499 Hz
Gb2 (G-flat 2) is 92.499 Hz in standard equal temperament at A=440 Hz. It is MIDI note number 42.
Gb2 Frequency in All Tuning Systems
| Temperament | Frequency (Hz) | Cents from Equal | Common Usage |
|---|---|---|---|
| Equal Temperament | 92.499 Hz | 0.00 | Modern standard; piano, fretted instruments |
| Pythagorean | 92.813 Hz | +5.87 | Medieval/early music; string ensemble open fifths |
| Just Intonation (Major) | 91.978 Hz | -9.78 | A cappella vocal, barbershop, Renaissance |
| Just Intonation (Minor) | 91.978 Hz | -9.78 | Minor-key vocal music, string ensembles |
| Quarter-Comma Meantone | 91.952 Hz | -10.27 | Renaissance keyboard, early Baroque organ |
| Third-Comma Meantone | 91.770 Hz | -13.70 | Renaissance vocal music in minor keys |
| Sixth-Comma Meantone | 92.133 Hz | -6.86 | Baroque orchestral ensemble compromise |
| Werckmeister III | 92.499 Hz | 0.00 | Baroque keyboard; Bach contemporaries |
| Werckmeister IV | 92.082 Hz | -7.82 | Baroque keyboard, strong key contrast |
| Werckmeister V | 92.499 Hz | 0.00 | Specialized Baroque keyboard |
| Kirnberger III | 92.551 Hz | +0.97 | Classical-era keyboard, keys near C major |
| Vallotti | 92.499 Hz | 0.00 | Baroque/Classical orchestral tuning |
| Young (1799) | 92.499 Hz | 0.00 | Classical-era keyboard |
| Bach/Lehman | 92.603 Hz | +1.95 | Bach keyboard works, Well-Tempered Clavier |
| Neidhardt | 92.499 Hz | 0.00 | 18th century keyboard, near-equal alternative |
| Kellner (Bach) | 92.457 Hz | -0.79 | Bach keyboard reconstruction |
Positive cents = sharper than equal temperament. Negative cents = flatter. 100 cents = 1 semitone.
Gb2 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) | 92.499 Hz | US, UK, and most modern ensembles worldwide |
| A = 442 Hz | 92.919 Hz | Many European orchestras; France, Germany |
| A = 443 Hz | 93.129 Hz | Berlin Philharmonic; some US orchestras |
| A = 432 Hz | 90.817 Hz | Alternative tuning; Baroque revival |
| A = 415 Hz (Baroque) | 87.243 Hz | Historically-informed Baroque performance |
f = f_at_A440 × (concert_pitch / 440)
Instruments That Play Gb2
Gb2 (92.499 Hz) falls within the comfortable playing range of 25 instruments.
Gb2 and F#2 — Enharmonic Equivalents
Gb2 and F#2 are enharmonic equivalents — they sound identical at 92.499 Hz but are written differently depending on the musical context.
Gb2: G♭ appears as the tonic of G♭ major (6 flats) and in flat key signatures. Common key signatures: G♭ major, D♭ major, C♭ major.
F#2: F♯ appears in sharp key signatures starting from G major (1 sharp) onward. Common key signatures: G major, D major, A major, E major, B major, F♯ major.
Enharmonic equivalents share the same frequency in equal temperament. In historical temperaments like Pythagorean or meantone, they may differ slightly.
Why Gb2 Varies Across Tuning Systems
Gb2 shows a maximum deviation of -13.70 cents in Third-Comma Meantone compared to equal temperament. This 14-cent difference reflects how different tuning philosophies prioritize interval purity over equal distribution.
In Third-Comma Meantone, Gb2 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 Gb2, making this note one where tuning system choice has a meaningful impact on pitch.
Gb2 Across All Tuning Systems
Explore how Gb2 is tuned in each historical temperament system. Each tuning system gives Gb2 a slightly different frequency, affecting the harmonic character of chords and melodies.
Tune Gb2 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.