Use javascript expressions, e.g. 'Math.tan(t)'.
t is the time, a and b are parameters.
Available: PI, cos, sin, tan, exp, log, sqrt, abs, pow, etc.
Set "Audio Volume" to zero to avoid feedback.
Stereo input may not work in some browsers.
Modern browsers require user interaction before accessing microphone.
To get audio from another program,
you can either physically connect your audio output to your audio input,
or use third party software.
E.g. VB-CABLE on Windows,
or Soundflower with
SoundflowerBed on Mac.