Stereo test

Identify left, right, and center channels with a panned reference tone.

ready

node examples/stereo-test.js 1k 1s
freq=<hz|note>
frequency or note name in the CLI (default: 1000)
-d, --duration <time>
run time (CLI accepts s/m/h suffixes; default: 1s)
Graph
Oscillator → StereoPanner → Envelope → Destination
Input
Frequency, duration
Output
Stereo audio

This is a stereo channel test: a reference tone pans through left, right, and center so you can identify which speaker or headphone channel is which. Run it in the browser at a low volume, or render the same panned tone from the Node CLI.