Fixed frequency blue wave, variable frequency green wave, and their superposition, the red wave.

Multiplier of second frequency:

E.g. if first (blue) frequency is 440Hz, then the second (green) frequency would be Hz

Unison   Octave

Half-step (just 16/15)   Minor third (just 6/5)   Major third (just 5/4)   Fourth (just 4/3)   Fifth (just 3/2)   Major seventh (just 15/8)

Half-step (equal)   Minor third (equal)   Major third (equal)   Fourth (equal)   Fifth (equal)   Major seventh (equal)

You can also use Left/Right keys to change the multiplier.

Play the sound: Start   Stop