Tone Generator - Sweep & Noise

A tone generator produces a pure, steady tone at a frequency you choose — useful for testing a speaker or subwoofer, checking the top of your own hearing range, tuning by ear, or masking distractions with noise.

Set any frequency from 1 Hz to 22 kHz and pick a waveform: sine, square, triangle, or sawtooth. Send it to the left channel, the right, or both. A sweep mode glides from one frequency to another over a time you set, so you can hear where a speaker starts to buzz or drop out.

• White, pink, and brown noise
• Nine ready-made presets to start from
• Independent left and right channel control
• An auto-off timer, so a tone doesn't run longer than you need

The app asks for no runtime permissions at all — it only makes sound. Everything works without an account.

For audio hobbyists, musicians, and anyone who needs a precise reference tone or a steady wall of noise.