Third Ear
Hz
Tones
A1
A2
B
Composer
Design a tone here. A1‑A2=B.
B is otoacoustic emission: the ear itself responding to the A tones.
Green: a note in the scale, or nearly
Click to place tones here. Right-click deletes. Once you create some bars, toggling stereo moves them to the left channel so you can add new tones to the right.