Drag the microphone icons (L and R) on the canvas to position them relative to your head (top-down view). The inter-microphone distance will be used for localization. Select two microphones for left and right channels. This assumes mono input from each; they will be merged into stereo for processing. In practice, test with your setup. Processing uses frequency-domain correlation via custom FFT implementation. Updated for iOS Safari compatibility: dynamic biquad coefficients based on sample rate, omitted fixed sample rate in AudioContext. Displays left (blue) and right (green) RMS as separate lines in the chart.