Beating between two tones
Frequency f
1
(Hz)
Frequency f
2
Play
Waveform
Sine
Sawtooth
Window
50 ms
200 ms
1 s
Roughness curve
Simple ratios
Equal-tempered intervals
f
2
=
f
2
/ f
1
=
Beat frequency
|f
1
− f
2
|
=
Space bar = play/stop. Arrow keys nudge the focused slider by one step.