Recognised as Musical note
A#1
- A#1
- 58.27 Hz
- MIDI 34
A#1 (enharmonically Bb1) is MIDI note 34, sounding at 58.27 Hz in equal temperament with A4 = 440 Hz. Its wavelength in air is 5.8863 m, and it sits in octave 1.
The canonical address for this page is /note-a-sharp1.
Pitch
Scientific pitch notationA#1
Enharmonic equivalentBb1the same pitch in equal temperament, spelled differently
MIDI note number34
Pitch classA# (10)
Octave1
As a sound wave
Wavelength in air5.8863 mat 343 m/s, dry air at 20 °C
Period17.1614 ms
Frequency one octave down29.135 Hz
AudibleYeshuman hearing runs roughly 20 Hz to 20 kHz and narrows with age
Intervals from here
Octave belowA#0 · 29.14 Hz
Perfect fifth belowD#1 · 38.89 Hz
Semitone belowA1 · 55 Hz
Semitone aboveB1 · 61.74 Hz
Major third aboveD2 · 73.42 Hz
Perfect fifth aboveF2 · 87.31 Hz
Octave aboveA#2 · 116.54 Hz
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Also reads as
NOTeAsHArP1 (chemical formula)
- Formula
- 304.46 g/mol
- 7 atoms
NOTeAsHArP1 has a molar mass of 304.46 g/mol, made up of 7 atoms across 7 elements: 1 × N, 1 × O, 1 × Te, 1 × As, 1 × H, 1 × Ar, 1 × P.
Molar mass
Molar mass304.46 g/mol
Total atoms per molecule7
Distinct elements7
Mass of one molecule5.0556772 × 10^-22 g
Molecules per gram1.9779744 × 10^21
Name
NameNot in the name tablea name cannot be worked out from a formula alone: isomers share formulas, and naming depends on bonding the formula does not show
Composition by mass
N4.6%
O5.3%
Te41.9%
As24.6%
H0.3%
Ar13.1%
P10.2%
Nitrogen (N)14.007 g/mol, 4.601%
Oxygen (O)15.999 g/mol, 5.255%
Tellurium (Te)127.6 g/mol, 41.91%
Arsenic (As)74.922 g/mol, 24.608%
Hydrogen (H)1.008 g/mol, 0.331%
Argon (Ar)39.95 g/mol, 13.122%
Phosphorus (P)30.974 g/mol, 10.173%
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