Tone Generator: Hz & Frequency

A tone and frequency generator for testing speakers, checking your hearing, tuning instruments and making steady sound for focus or sleep. Pure tones from 1 Hz to 22 kHz, white, pink and brown noise, binaural beats, isochronic pulses, sweeps and a metronome. Every feature is free. TONE GENERATOR • Any frequency from 1 Hz to 22 000 Hz - slide, step by 0.1, 1, 10 or 100 Hz, or type it in • Sine, square, triangle and sawtooth waves • Pick a note in any octave, with A4 tuned from 432 to 444 Hz (440 Hz by default) • Vibrato, tremolo, ring modulation, pulse width and an on-off pulse for isochronic tones • Mix up to ten tones at once for chords, beats and test signals • Popular frequencies one tap away - 432 Hz, 440 Hz, 528 Hz and 1 kHz - and pin your own TEST SPEAKERS, SUBWOOFERS AND CAR AUDIO • Bass test sweep from 200 Hz down to 20 Hz, to hear where your speaker or subwoofer runs out • Frequency sweeps, linear or logarithmic, with up to five legs in one run • Left, right or anywhere in between, to check one speaker at a time • Flip the right channel's polarity to check that two speakers are wired the same way • Export any signal to a WAV file, up to five minutes, at a set peak level for car audio HEARING CHECK • Checked the way an audiologist does it: eight pitches from 250 Hz to 16 kHz, one ear at a time • Your result as an audiogram - see where your hearing dips and how your two ears compare • A hearing range sweep for the highest pitch you can hear • Save the result as a PDF • Not a medical test NOISE AND BINAURAL BEATS • White, pink, brown, blue, violet and grey noise, generated live and never looped • A slow drift between the ears and a breathing swell • Lay noise under a tone, a mix or binaural beats, as loud as you like • Binaural beats with a different tone in each ear, delta to gamma in one tap METRONOME • 20 to 400 BPM - slide, step, type or tap the tempo in • Any meter from 1/4 to 12/8, with eighths, triplets or sixteenths • Stress or mute any beat, four click sounds and a tempo trainer • Feel the beat as a buzz or see it as a flash, with or without the click KEYS AND DIAL TONES • A playable keyboard with chords and arpeggio • DTMF telephone tones BUILT FOR LONG SESSIONS • Plays with the screen off and in other apps, with controls and tempo on the lock screen • A Control Centre button, and quick actions on the app icon for a tone, noise, the metronome or the hearing check • Auto-stop from 5 minutes to 8 hours, with a gentle fade at the end • Sequences: setups that play one after another, each for its own time, once or in a loop • Named presets you can move to another phone, and recent frequencies one tap away • Share a tone as a link that opens in the app or in a browser • No clicks on start, stop or any change, every wave at the same loudness • Six colours, light and dark, and the app icon follows • For iPhone and iPad, two panes on iPhone Duo, 15 languages and a step-by-step guide WHAT PEOPLE USE IT FOR • Speakers and subwoofers: rattles, buzzes and where the bass rolls off • Car audio: test files at a known level, crossovers and channels • Room acoustics: find the frequencies where a room booms • Musicians: a reference pitch and a metronome in one app • Classrooms and labs: resonance, beats, Chladni plates • Focus and sleep: steady noise with a timer that fades out ACCURATE BY DESIGN • Band-limited square, triangle and sawtooth waves - no aliasing, even near 22 kHz • Plays at your device's native sample rate, nothing resampled • Pauses for calls and stops when headphones are unplugged • Works offline, with no account and no sign-up TURNING ADS OFF • After you press Stop, an ad without sound may show - never while a tone plays • The "No ads for 24 h" button, for watching a short video • A one-time purchase of the app without ads HEARING SAFETY Pure tones put all their energy on one frequency and feel quieter than they are. Start at a low volume. Made by KirsuLab LLC.