Test Tones

Tones to play or download: a frequency generator, bass tests, speaker tones, tuning notes and a Shepard tone.

Test tones, each on its own page, to play in your browser or download as a WAV file. The frequency generator plays any tone from 20 to 20,000 Hz as a sine, square, sawtooth or triangle wave.

11 pages

Tone GeneratorPress Play for a 440 Hz sine tone, then drag or type any frequency from 20 to 20,000 Hz.
Volume TestPress Play for a quiet tone, then press the six steps lower down, from 1% to 50% volume.
A 440 Tone GeneratorPress Play for A at 440 Hz, then pick a note or tuning pitch by name: an A440 tone generator.
Subwoofer Bass TestPress Play for a 50 Hz tone, then step this bass tone generator from 160 Hz down to 20 Hz.
High Frequency Sound GeneratorPress Play for a quiet 10,000 Hz tone, then step this high frequency generator up to 20,000 Hz.
Headphone Bass TestPress Play for a quiet 60 Hz tone in both ears, then step each ear down to 20 Hz.
Test Tones for SpeakersPress Play for a quiet 1,000 Hz sine tone, then step from 125 Hz up to 16 kHz.
40 Hz Test Tone for Subwoofers and Rattle HuntingPress Play for a steady 40 Hz sine wave, or Save WAV to download a 60-second file for the car.
Quarter Tone GeneratorPress Play for A half sharp, 452.89 Hz, then pick any quarter tone from middle C up.
Shepard Tone Generator with Speed and Direction ControlsPress Play for a tone that seems to climb for ever, then set its speed and direction or save a looping WAV.
Octave Tone GeneratorPress Play for A at 440 Hz, then pick a row: the same note, octaves higher or lower.

More about these tools

The subwoofer bass test steps from 160 Hz down to 20 Hz, and the headphone bass test from 125 Hz, one ear at a time. Test tones for speakers go up by octaves from 125 Hz to 16 kHz. The A 440 tone generator plays tuning notes by name. The 40 Hz test tone has 27 rattle checks for a car or a room, and the Shepard tone generator plays a pitch that seems to rise or fall forever. Every page starts quietly and fades in. Low tones need real speakers: a phone speaker gives little or nothing at 40 Hz.

All 11 tools

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