Sound test

Free Sound Test

Free online sound test. Verify left, right, and both stereo channels, sweep from 100 Hz to 10 kHz to check speaker range, and confirm headphone wiring with a beep-per-channel test.

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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.
L
R
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.
Rate Sound Test: 3.7 (3 ratings)
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Sound Test is a free, browser-based online sound test.

  • Cost: Free, no signup
  • Install: None — runs in the browser
  • Privacy: Runs locally, no uploads
  • Platforms: Windows, macOS, Linux, Android, iOS
  • Time: Under a minute

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. You pick the channel (left / right / both / ping-pong), the frequency (40 Hz to 12 kHz), and the volume (0-100%), and the tool plays the tone continuously until you stop it. Simple, reliable, and sufficient for the three most common audio checks.

Three Tests In One

  1. 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).
  2. Ping-pong A/B — automatically alternates left and right every 0.7 seconds so you don't have to click between modes. Quickest way to verify a new pair of headphones was plugged in correctly.
  3. Frequency sweep — ramps logarithmically from 100 Hz to 10 kHz over 8 seconds. You hear where your speakers start to roll off (low-end) and where tweeters run out of steam (high-end).

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. If the left channel plays clearly at 1 kHz but silence at 100 Hz, you know exactly that the speaker's low-end is compromised, not the overall wiring. Sine tones are also how audio engineers calibrate studio monitors.

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. Don't increase past the point where the tone feels loud, especially during the sweep when frequencies change rapidly. Remove in-ear monitors between tests if you need to adjust 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.

Related guide Headphone and Speaker Test: Check Left and Right Audio Channels →

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