Musical Frequencies
D0
18.35 Hz
Note: D0
Cosmic Octave Color
Derived visible color (464 nm)
Display swatch #2595ff
Octave-shifted: 36.70 Hz (+1 octaves)
EstablishedMusical Standard
Evidence Level
Established
Source Count
1
Last Reviewed
March 23, 2026
Directly measured, standardized, or well-supported in mainstream scientific or technical literature.
This entry documents a musical reference or standard. It should be read as an acoustic and musical reference rather than a biological claim.
Review the evidence modelMusical note D in octave 0. Sub-bass range.
Period
54.50 ms
Wavelength
18.69 m
Claim Type
Musical Standard
Cosmic Octave Color
Derived visible color (464 nm) · #2595ff
Source
Equal temperament tuning system (A4 = 440 Hz)
Sources
Equal Temperament Tuning System
108 atlas references
The twelve-tone equal temperament reference used for note-frequency lookups throughout the atlas.
Standard equal-temperament note table with A4 = 440 Hz.
Harmonic Series
Octave Ladder
Every audible octave of this frequency — the same tone, higher and lower.
Nearby in the Atlas
Entries within ±35 cents of this tone when reduced to the same octave — candidates for pairing or comparison.
D3Musical Frequencies
146.83 Hz+0.4¢
D4Musical Frequencies
293.66 Hz+0.4¢
D5Musical Frequencies
587.33 Hz+0.4¢
D6Musical Frequencies
1.2 kHz+0.4¢
D7Musical Frequencies
2.3 kHz+0.4¢
D8Musical Frequencies
4.7 kHz+0.4¢
musicequal-temperamentoctave-0