Tone Generator+ Freq

Tones 1 Hz–22 kHz, built-in tuner, sweeps and safety notes.

Tone Generator+ Freq produces precise audio tones from 1 Hz to 22 kHz. Sine, square, sawtooth, triangle, and noise for testing, calibration, and experiments.

Set frequency with the dial or type the exact Hz. Built-in instrument tuner reads pitch in cents. Layer up to four tones in the mixer. Presets include tinnitus mask, sleep, dog whistle, cat repel, brainwave beats, and solfeggio.

Sweep between two frequencies, or play mono, stereo, binaural, and isochronic channels. Start quiet — loud tones can damage hearing and speakers.

Clean, glitch-free output through the iPhone speaker or a connected output.