Wave

A single pure frequency and nothing else. The one to use for testing speakers, headphones or room response.

From

Anywhere from 1 Hz to 20,000 Hz, in either direction: set From above To for a falling sweep.

Sweep curve

Equal time per octave, which is how the ear hears pitch. 20 Hz to 20 kHz spends as long on the bass as on the treble.

Duration20 s

Volume50% · -6.0 dBFS

Peak level of the file. Start your speakers low: a tone at full level for minutes is hard on ears and on tweeters.

20 Hz20.0 s sweep

Pick a wave and a range, then press Generate. The sweep plays here as soon as it is ready, and the file you hear is the file you download. Click the chart to jump to any frequency.