What frequency range does the tone generator support?
This tone generator accepts exact frequencies from 20 Hz through 20000 Hz, and the note controls stay inside that same audible range.
Tone generator for steady reference pitches
Octave: 4
Note: A
Generator
Gain: 0 dB
Need a quick reference pitch?
Use the Tone Generator app or extension for steady pitches during tuning, rehearsal, ear training, and sound checks when you want the note or exact Hz ready right away.
Common questions
How do note and octave mode work here?
The note control picks one chromatic note from C through B, and the octave control chooses the register from 1 through 8. Together they calculate the reference frequency automatically using standard equal-tempered tuning with A4 at 440 Hz.
Can I enter an exact Hz value manually?
Yes. Click the frequency readout, type the number you want, and set it directly. This is useful when you want repeatable sound-check or ear-training targets instead of note names.
Does the tone generator stay on my device?
Yes. The tone is generated locally with your device audio engine, so playback starts there without a server-side audio step.
What this tone generator does
This tool plays a steady sine-wave reference tone locally on your device, with note, octave, exact Hz entry, and gain control ready on the same screen.
How to use note mode
Set the octave, choose the note, and press play when you want a quick musical reference like A4 or C5. This is the fastest path when you already think in notes instead of raw numbers.
When exact Hz is the better fit
Click the large frequency readout and enter the exact value when the number matters more than the note name. That is useful for sound checks, repeatable tests, and ear-training exercises built around one fixed target.
When preset starts help most
Use the ready-made preset links when you keep returning to the same references, such as A4 for tuning, Middle C for class starts, or fixed values like 432 Hz, 440 Hz, and 1000 Hz.
Good uses for a steady tone
A steady tone is handy for tuning by ear, checking intervals, matching a starting pitch, testing speaker or interface behavior, and giving a class or rehearsal group one clear reference tone to center on.
Why this stays immediate
The tone starts locally on your device without sending audio anywhere else, so the controls stay immediate and the setup stays lightweight.
Start with a ready reference
Jump straight to a few common note and exact-frequency presets, then scan the full note and Hz set below when you want a different starting pitch.
A4
Tone generator preset for A4 at 440 Hz with note, octave, exact Hz, and gain control.
C4
Tone generator preset for C4 at 261.626 Hz with note, octave, exact Hz, and gain control.
C5
Tone generator preset for C5 at 523.251 Hz with note, octave, exact Hz, and gain control.
432 Hz
Tone generator preset for 432 Hz in exact-frequency mode with gain control and quick access to nearby fixed references.
440 Hz
Tone generator preset for 440 Hz in exact-frequency mode with gain control and quick access to nearby fixed references.
442 Hz
Tone generator preset for 442 Hz in exact-frequency mode with gain control and quick access to nearby fixed references.
528 Hz
Tone generator preset for 528 Hz in exact-frequency mode with gain control and quick access to nearby fixed references.
1000 Hz
Tone generator preset for 1000 Hz in exact-frequency mode with gain control and quick access to nearby fixed references.
All note presets
Every chromatic note from octave 1 through octave 8 is available as its own starting point, so you can open the reference you want instead of dialing it in from scratch.
Octave Octave 1
Octave Octave 2
Octave Octave 3
Octave Octave 4
Octave Octave 5
Octave Octave 6
Octave Octave 7
Octave Octave 8
Exact-frequency presets
These fixed references keep a few widely used values one click away for tuning work, repeatable checks, and sound-system tests.
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