D4 — 293.665 Hz

D4 (D4) is 293.665 Hz in standard equal temperament at A=440 Hz. It is MIDI note number 62.

D4 Frequency in All Tuning Systems

Temperament Frequency (Hz) Cents from Equal Common Usage
Equal Temperament 293.665 Hz 0.00 Modern standard; piano, fretted instruments
Pythagorean Tuning 293.332 Hz -1.96 Medieval/early music; string ensemble open fifths
Just / Pure 294.329 Hz +3.91 A cappella vocal, barbershop, Renaissance
Meantone 1/3 Comma 294.550 Hz +5.21 Renaissance vocal music in minor keys
Meantone 1/4 Comma 294.245 Hz +3.42 Renaissance keyboard, early Baroque organ
1/6 SC - Attenuated 293.997 Hz +1.96 Baroque orchestral ensemble compromise
Kellner's Bach 294.196 Hz +3.13 Bach keyboard reconstruction
Kirnberger III 294.245 Hz +3.42 Classical-era keyboard, keys near C major
Vallotti 293.997 Hz +1.96 Baroque/Classical orchestral tuning
Werckmeister III 294.329 Hz +3.91 Baroque keyboard; Bach contemporaries
Werckmeister IV 294.329 Hz +3.91 Baroque keyboard, strong key contrast
Werckmeister V 294.994 Hz +7.82 Specialized Baroque keyboard

Positive cents = sharper than equal temperament. Negative cents = flatter. 100 cents = 1 semitone.

D4 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) 293.665 Hz US, UK, and most modern ensembles worldwide
A = 442 Hz 295.000 Hz Many European orchestras; France, Germany
A = 443 Hz 295.667 Hz Berlin Philharmonic; some US orchestras
A = 432 Hz 288.325 Hz Alternative tuning; Baroque revival
A = 415 Hz (Baroque) 276.979 Hz Historically-informed Baroque performance

f = f_at_A440 × (concert_pitch / 440)

Instruments That Play D4

D4 (293.665 Hz) falls within the comfortable playing range of 53 instruments.

Acoustic Guitar Alto (Contralto) Alto Flute Alto Saxophone Banjo (5-string) Banjo (Tenor, 4-string) Baritone Bass Bass Clarinet Bass Flute Bass Guitar (4-string) Bass Trombone Bassoon Cello Chimes (Tubular Bells) Clarinet in A Clarinet in Bb Classical Guitar Cornet Double Bass Electric Bass (5-string) Electric Guitar English Horn Euphonium Flugelhorn Flute French Horn in F Harp (Pedal) Mandolin Marimba Mezzo-Soprano Oboe Oboe d'Amore Recorder (Bass) Recorder (Tenor) Soprano Soprano Saxophone Tenor Timpani Trombone (Tenor) Trumpet in Bb Trumpet in C Tuba (Bb) Tuba (C) Tuba (Eb) Tuba (F) Ukulele (Baritone) Ukulele (Concert) Ukulele (Soprano) Ukulele (Tenor) Vibraphone Viola Violin

D4 Across All Tuning Systems

Explore how D4 is tuned in each historical temperament system. Each tuning system gives D4 a slightly different frequency, affecting the harmonic character of chords and melodies.

Equal Temperament Pythagorean Tuning Just / Pure Pythagorean Just Perfect 5ths Meantone 1/3 Comma Meantone 1/4 Comma 1/6 SC - Attenuated Almost-equal Barnes' Bach Kellner's Bach Kirnberger III Shifted Vallotti/Young's Well Vallotti Werckmeister III Werckmeister IV Werckmeister V Rousseau II

D4 in Historical Temperament Systems

Explore how D4 (293.665 Hz in equal temperament) is tuned in each of the 15 historical non-equal temperament systems. Each system places D4 at a slightly different frequency based on its mathematical basis.

Pythagorean Tuning Just / Pure Meantone 1/3 Comma Meantone 1/4 Comma 1/6 SC - Attenuated Kellner's Bach Kirnberger III Vallotti Werckmeister III Werckmeister IV Werckmeister V

Tune D4 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.

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