FREQUENCY
MODE
NOTE
OCTAVE
HERTZ
WAVE
Precision Reference Tones
Get the exact pitch you need—by note name or precise frequency. Tune instruments to any reference, test your ears against a known pitch, or calibrate audio equipment with scientific accuracy.
In the app
Here are some things that are even better in the app.
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Hmmmm...
OK, I am not going to lie: this is just a tone generator. It is the same in the app.
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Ah, no, actually
There is one extra: you can choose the sound (sine, square, sawtooth, triangle).
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Works offline
You never know when you need to generate a pure sine wave in the middle of nowhere.
The Full Experience
What a steady tone is good for
A tone that holds exactly where you put it, for as long as you want it, is more useful than it sounds.
Two decimal places, or just a note name
Type 442.35 Hz when that is what you need, or pick a note and an octave and let it do the arithmetic.
Change the waveform mid-tone
Move between sine, triangle, square, and sawtooth without stopping, and hear how much of an instrument's character is just harmonics.
It starts and stops without a click
A short ramp at each end, so a long reference tone will not spike your monitors or your ears when you hit stop.
9 Tools for Musicians
The mobile app groups them the same way: analyze what you play, make sound, then train your ear.
Analyze
Pitch Diagram
Real-time pitch graph. See every note you sing or play.
Pitch Spectrogram
See multiple notes at once. Analyze chords and harmonies.
Tuner
Cent-accurate chromatic tuner with spectrogram context.
Intonation Tracker
Track how close you are to each target note in cents.
Spectrum Analyzer
Log-frequency spectrum from 10 Hz to 20 kHz.
Sound
Tone Generator
Generate reference tones by note name or frequency.
Keyboard
Sampled instruments, visual feedback, and quick octave controls.
Learn
Relative Pitch Interval Training
Identify scale degrees by ear. Hear a cadence and tap the correct degree.
Solfege Trainer
Sing scale degrees in key. Build pitch memory through vocal practice.
Available on iOS and Android