Free Sound Test

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.

Related Tools

• Headphone & Speaker Tester
• Decibel Meter
• Microphone Test