Browser Harmonium
A minimal desktop harmonium tuned for the keyboard under your hands.
Press the mapped keys to shape air-driven harmonium tones with a soft attack, long release, and subtle motion in both sound and interface.
Playing Range
C2-A#5
Nearly four chromatic octaves across the printable keyboard.
47 keys
Numbers, letters, and punctuation all participate in the map.
Instrument
Play from your keyboard or tap the on-screen keys
Hold a key for sustain and release it to hear the harmonium fade naturally. Repeated keydown events are ignored while a note is already active. On touch devices, press and hold any tile to play it directly.
Dynamic grid packs every mapped key without empty gaps
47 keys visible
Transpose
Octave Shift
Shift the entire keyboard up or down without changing the layout.
Original
Range: -2 to +2
Mapping Guide
Laptop keys to harmonium notes
Use the lower and upper letter rows together with the number row sharps to cover the full C3 to B4 range.
C2
65.41 Hz
`
C#2
69.30 Hz
1
D2
73.42 Hz
2
D#2
77.78 Hz
3
E2
82.41 Hz
4
F2
87.31 Hz
5
F#2
92.50 Hz
6
G2
98.00 Hz
7
G#2
103.83 Hz
8
A2
110.00 Hz
9
A#2
116.54 Hz
0
B2
123.47 Hz
-
C3
130.81 Hz
=
C#3
138.59 Hz
q
D3
146.83 Hz
w
D#3
155.56 Hz
e
E3
164.81 Hz
r
F3
174.61 Hz
t
F#3
185.00 Hz
y
G3
196.00 Hz
u
G#3
207.65 Hz
i
A3
220.00 Hz
o
A#3
233.08 Hz
p
B3
246.94 Hz
[
C4
261.63 Hz
]
C#4
277.18 Hz
\
D4
293.66 Hz
a
D#4
311.13 Hz
s
E4
329.63 Hz
d
F4
349.23 Hz
f
F#4
369.99 Hz
g
G4
392.00 Hz
h
G#4
415.30 Hz
j
A4
440.00 Hz
k
A#4
466.16 Hz
l
B4
493.88 Hz
;
C5
523.25 Hz
'
C#5
554.37 Hz
z
D5
587.33 Hz
x
D#5
622.25 Hz
c
E5
659.26 Hz
v
F5
698.46 Hz
b
F#5
739.99 Hz
n
G5
783.99 Hz
m
G#5
830.61 Hz
,
A5
880.00 Hz
.
A#5
932.33 Hz
/