Free Sound Test - Speaker & Headphone Channel Test Online

Sound Test

Play left-only, right-only, or both channels to verify wiring. Then sweep 100 Hz → 10 kHz to hear the usable frequency range of your speakers or headphones.

First time? Your browser will ask for audio permission on the first play. Set your system volume to about 30% before starting — the sine tones can be loud.

Channel

Frequency: 440 Hz

Volume: 30%

Now playing: Idle

Tip: if only one side plays when "both" is selected, the problem is wiring (bad cable, bad jack, bad Bluetooth pairing) not software. The ping-pong pattern is the quickest way to A/B test.

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Sound Test guide

How to use the Sound Test accurately

This tool generates pure sine-wave tones directly in the browser using the Web Audio API. No downloads, no uploads, no tracking — every sample is generated live on your device.

01 What The Sound Test Does This tool generates pure sine-wave tones directly in the browser using the Web Audio API. No downloads, no uploads, no tracking — every sample is generated live on your device.

02 Three Tests In One Channel wiring test — picks left only, right only, or both. If a supposedly-stereo setup only plays on one side when you pick "both," you have a wiring or TRS-jack-seating problem (not a software problem).

03 Why Sine Tones, Not Music? Music is a complex mix of frequencies, so if something's wrong, you can't tell which frequency is the problem. A single sine wave is pure — one frequency, no harmonics, no ambiguity.

04 Safety Note About Volume Pure sine tones — especially at high frequencies — can sound surprisingly loud and cause tinnitus at the same perceived volume where music is pleasant. Start at 20-30% system volume.

sound test online speaker test headphone channel test left right audio test stereo test audio sweep test

Pure sine tones — especially at high frequencies — can sound surprisingly loud and cause tinnitus at the same perceived volume where music is pleasant. Start at 20-30% system volume.

Sound Test FAQ

Common sound test questions

How do I test left and right speakers?

Set the channel to Left only — sound should only come from the left speaker or left ear. Repeat with Right only. Use Both to verify stereo output. Ping-pong mode alternates L / R automatically.

Why is my left channel silent in Both mode?

Almost always a wiring issue — TRS jack not fully seated, worn cable, or wrong channel mapping on Bluetooth. If Left only plays correctly but Both does not, the hardware side is at fault.

Are sine tones safe for my ears?

At moderate volume, yes. Sine tones sound louder than music at the same amplitude, so start at 20-30 percent system volume and increase slowly. Stop immediately if ringing occurs.

What does the sweep test?

It ramps logarithmically from 100 Hz to 10 kHz over 8 seconds. You hear where your speakers roll off at the low end (sub-bass they cannot reproduce) and where tweeters fade at the top.

Checklist

Audio checks to confirm

What The Sound Test Does This tool generates pure sine-wave tones directly in the browser using the Web Audio API. No downloads, no uploads, no tracking — every sample is generated live on your device.
Three Tests In One Channel wiring test — picks left only, right only, or both. If a supposedly-stereo setup only plays on one side when you pick "both," you have a wiring or TRS-jack-seating...
Why Sine Tones, Not Music? Music is a complex mix of frequencies, so if something's wrong, you can't tell which frequency is the problem. A single sine wave is pure — one frequency, no harmonics, no...