EPI
CYCLE
Fourier Transform Laboratory
State
EMPTY
Harmonics
—
/ 96
RMS error
—
Period
—
Audio
silence
01
Machine
Shape
Wave
Pause
Clear
Speed
0.22 rev/s
02
Spectrum
hover a bar · click to mute
03
Reconstruction
partial sum vs original
Harmonics
n = 24
04
Signal · Audio
additive synthesis
Listen
Pitch
220 Hz
Harmonics
n = 8
Volume
50%
EPICYCLE — shortcuts
draw → circles → spectrum → sound
Space
pause / resume the machine
S
start / stop the sound
1 – 7
sine · square · saw · triangle · heart · pi · star
D
switch drawing mode: closed shape ↔ one wave period
C
clear the canvas
↑ / ↓
harmonics in the machine (Shift: audio harmonics)
← / →
animation speed (Shift: pitch)
M
mute / unmute the hovered harmonic
click spectrum
mute that harmonic everywhere — shape, sum, sound
drag convergence
scrub the harmonic count directly
Esc closes this card · click anywhere to dismiss
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