Musical Frequencies
A#0
29.14 Hz
Note: A#0
Cosmic Octave Color
Derived visible color (585 nm)
Display swatch #e1c53e
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 A# in octave 0. Sub-bass range.
Period
34.32 ms
Wavelength
11.77 m
Nearest Note
A#0 (0¢)
Claim Type
Musical Standard
Cosmic Octave Color
Derived visible color (585 nm) · #e1c53e
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.
A#1Musical Frequencies
58.27 Hz-0.3¢
A#2Musical Frequencies
116.54 Hz-0.3¢
A#3Musical Frequencies
233.08 Hz-0.3¢
A#4Musical Frequencies
466.16 Hz-0.3¢
A#5Musical Frequencies
932.33 Hz-0.3¢
A#6Musical Frequencies
1.9 kHz-0.3¢
musicequal-temperamentoctave-0