Audio Routing

Send one input to the left and right outputs, with per-side volume and delay.
Selecting a metronome starts browser audio.
For demonstration purposes, the left browser output has a fixed additional delay of 57 ms that is not shown in the delay control; with both controls at 0 ms, the left metronome is therefore 57 ms late.
Setting the right delay to 57 ms aligns both sides.
Browser, operating-system and hardware latency are additional to the configured delay.
Reloading the page resets the input to “Not assigned” and assigns the left and right browser outputs by default.