tone generator
Play any test tone from 20 Hz to 20 kHz or run a sine sweep free, and download it as lossless wav.
test tones for speakers, headphones, rooms and ears
Type a frequency or slide to it on a musical log scale, choose sine, triangle, square or sawtooth, send it to the left, right or both channels, and play. The presets cover the classic checks: 1 kHz reference, 60 Hz hum, sub bass at 40 Hz, and the hearing-range steps from 12 kHz up to 20 kHz. The closest note and its offset in cents show under the frequency, which makes it a handy reference pitch too.
Sweep mode glides from one frequency to another over any number of seconds, logarithmically like music or linearly like a lab, with a live readout and optional looping. Anything you set up can be downloaded as a lossless 48 kHz wav with click-free fades, ready for a test CD, a room measurement or a plugin test.
common questions
what frequency should I use to test speakers?
A slow 20 Hz to 20 kHz log sweep exposes rattles and dropouts, a 1 kHz sine is the standard level reference, and 40 to 60 Hz tones show whether a subwoofer is actually doing anything. Keep the volume low: a pure tone has no peaks to warn you before it gets loud.
what is the highest frequency I can hear?
Most adults top out between 15 and 18 kHz, teenagers near 20 kHz. Step through the presets from 12 kHz upward at a quiet, fixed volume and note where it goes silent for you.
can I download the tone?
Yes, as a lossless wav at 48 kHz, 5 to 60 seconds for tones and the full duration for sweeps, with short fades so it never clicks.