A third type of panning function is Sine-Law Panning. As the name suggests, this type of panning is based on the sine function.
Similar to linear and square-law panning, an amplitude value for the left channel and right channel of a stereo signal can be calculated based on the sine-law panning functions. Then a mono signal can be converted to a stereo signal by multiplying by the amplitude value for each channel.
Just as before, the relationship between an amplitude, , and a pan knob value, , is: .
For Sine-Law panning, the amplitude of the right channel and left channel can be calculated:
Sine-law panning is similar to square-law panning in that it maintains equal-combined power across both channels, but does not maintain equal-combined amplitude.