Stereo Test | Left Right Audio Test
Verify left/right channels, center balance, alternating output and stereo pan sweep online.
- #audio
- #test
Verify left/right channels, center balance, alternating output and pan sweep.
Stereo Modes
Safety Notice
This tool is not a medical device and is not intended to diagnose, treat, or prevent any disease. Start at a low volume to protect your hearing and stop immediately if you feel discomfort.
Related tools
Tools in the same group or category
Speaker Test
Test left, right, bass, mid and treble speakers with reference tones. Free online speaker test.
Tone Generator
Generate frequencies from 20Hz to 20kHz online. Includes 100Hz Research Mode, audio test tones, speaker testing, timer and stereo output.
Frequency Sweep
Sweep from 20Hz to 20kHz for speaker, headphone and hearing range testing. Custom range and loop support.
Metronome
Set BPM and time signature for free practice. Runs in your browser with Web Audio API — no uploads.
Guitar Tuner
Detect guitar string pitch in real time with your microphone and tune accurately. Free online guitar tuner.
Launchpad
Play kick, snare, hi-hat and more on a 4×4 drum pad grid. Free online launchpad with keyboard mapping and volume control.
Frequently asked questions
What is alternating L/R mode?
It switches between left and right channels every 2 seconds at 1kHz.
What is pan sweep?
Audio pans smoothly from left to right and back for stereo imaging checks.
Can I use it with headphones?
Yes. Ideal for checking headphone channel balance.