SingMeter

🔊 Tone Generator

Generate precise audio tones for pitch reference and ear training. Perfect for vocal practice, instrument tuning, and developing your musical ear.

440.00 Hz
A4
20 Hz10,000 Hz20,000 Hz
0%50%100%

🎤 Singing Practice Path

This page works best as a pitch reference—not a tuner you glance at once. Use a sine wave at low volume, pick notes inside your comfortable range (from the Vocal Range Test), then verify every match on the Pitch Detector. The flow below is written for singers, not general audio testing.

10-Minute Session: Reference → Sing → Check

  1. 1Take the Vocal Range Test (or recall your last result). Choose a starting note in the middle of your comfortable range—often C4 for many voices or G3/A3 for lower voices.
  2. 2On this page: select that note preset (or matching frequency), choose sine waveform, set volume to about 30–40%, and press Play. Listen for two full seconds before you sing.
  3. 3Sing the same pitch on a steady “Ah” or “Mah” for 3–5 seconds without scooping up to the note.
  4. 4Open the Pitch Detector in another tab, sing again, and aim to stay in the green zone (within about ±10 cents).

Three routines you can repeat daily

Routine 1· 5 minutes

Warm-Up Match (comfort notes)

Tool settings: Sine wave · volume 30–40% · one note at a time

Cycle through three comfortable notes (for example C4 → E4 → G4, or whatever sits in your range). Play each tone, listen, stop the tone, then sing and hold. Rest 10 seconds between notes. If your throat tightens, choose an easier note—this routine is about clean onset, not your highest pitch.

Goal: Start each note within one second of the reference, without sliding from below or above.

Routine 2· 5–7 minutes

Interval Jump (ear + voice)

Tool settings: Sine wave · same volume

Play your root note (e.g. C4). Stop. Sing a perfect fifth above (G4) from memory, then play G4 to check. Repeat with a major third (C4 → E4) and a fourth (C4 → F4). Wrong note? Replay the target tone once, re-sing, then check on the Pitch Detector.

Goal: Land the second note confidently; use the generator only to confirm, not to scoop into pitch.

Routine 3· 7 minutes

Scale Builder (with steady time)

Tool settings: Sine on root note · optional Metronome at 70–80 BPM

Play C4 (or your chosen root). Sing a five-note major scale up and down on “La” or “Mi”. Use the tone only on the first and last note of each pass; inner notes are from memory. For rhythm, turn on the Online Metronome at 72 BPM, one syllable per beat.

Goal: Finish the scale in tune on the top note—play that note on the generator to verify.

What to do next

Pitch Detector →

Instant feedback while you match reference tones.

Vocal Range Test →

Pick starting notes that sit in your comfortable range.

Online Metronome →

Keep scales and exercises rhythmically steady.

Go deeper: Improve Singing Pitch — daily detector routines

Pitch reference tuned for vocal practice, not lab audio

The notes below come from how we use and test SingMeter tools in real practice sessions.

How we test this tool

We validate this generator against concert A4 (440 Hz) on multiple devices and compare sung matches on our Pitch Detector. The goal is a stable reference singers can hear clearly at low volume—not the loudest possible tone.

  • •Frequency readout: Web Audio oscillator targets the selected Hz; we spot-check A4, C4, and G4 against an external tuner and expect agreement within about ±0.1 Hz at comfortable volumes.
  • •Waveform choice: sine wave only for vocal matching tests—square/sawtooth add harmonics that confuse the ear and can pull the Pitch Detector toward overtones.
  • •Volume safety: default 50% with earbuds; we flag any session where users need >70% volume to hear the tone over room noise (fix the room, not the slider).
  • •Note presets: each labeled note (C4–A5) is checked against our internal frequency table so preset buttons match the Hz field after selection.
Practice case15 min · sine wave · 30–40% volume

15-minute pitch calibration loop (Tone → sing → detector)

  1. 1From your Vocal Range Test, pick a middle note (e.g. G3, C4, or G4). Select it here, sine waveform, volume ~35%.
  2. 2Play 3 seconds → stop → sing “Ah” on that pitch for 4 seconds without scooping. Repeat once.
  3. 3Open Pitch Detector: sing the same note and hold until cents stay within about ±10 for 3 seconds.
  4. 4Move up a major third (e.g. C4 → E4): play reference, sing, check on detector. One replay of the tone allowed if you miss.
  5. 5Finish on your starting note. Log whether you tended flat or sharp today—that bias is what you correct tomorrow.

Common misconceptions

“The tone generator tells me if I’m in tune.”
It only plays the target pitch. You still need your ear or the Pitch Detector for feedback—this tool is the reference, not the judge.
“Louder reference = easier to match.”
High volume masks pitch errors and fatigues your ear. We practice at 30–40% with headphones; increase room quietness before volume.
“Any waveform works for vocals.”
Use sine for pitch work. Square or sawtooth are useful to hear timbre differences, but they are poor references for matching vocal pitch cleanly.

Go deeper on SingMeter

📖 About the Tone Generator

The Tone Generator is a powerful tool for musicians, singers, and audio enthusiasts. It generates precise audio tones at any frequency you specify, making it perfect for pitch reference, ear training, instrument tuning, and vocal practice.

Whether you're a beginner learning to match pitch or an experienced musician fine-tuning your instrument, this tool provides a reliable reference tone. The generator supports frequencies from 20 Hz (very low bass) to 20,000 Hz (very high treble), covering the full range of human hearing.

You can choose from four different waveform types, each with its own unique sound character. Sine waves produce pure, smooth tones ideal for pitch reference. Square waves have a harsher, more complex sound. Sawtooth waves are rich in harmonics, while triangle waves offer a softer alternative to square waves.

The tool also includes convenient musical note presets, allowing you to quickly access standard tuning frequencies like A4 (440 Hz, the concert pitch) or any note in the musical scale. This makes it easy to practice singing specific notes or tune instruments to standard pitches.

Use the volume control to set a comfortable listening level. We recommend starting with lower volumes, especially when using headphones, to protect your hearing. The tone will play continuously until you click the stop button, giving you plenty of time to match the pitch with your voice or instrument.

📚 How to Use

  1. 1.
    Select a Note or Frequency:

    Choose a musical note from the preset buttons (like A4 for 440 Hz) or use the frequency slider to set a custom frequency. The frequency range is 20 Hz to 20,000 Hz, covering the full spectrum of human hearing.

  2. 2.
    Choose Waveform Type:

    Select from sine (pure tone), square, sawtooth, or triangle waveforms. Sine waves are best for pitch reference, while other waveforms can be useful for ear training and understanding harmonic content.

  3. 3.
    Adjust Volume:

    Use the volume slider to set a comfortable listening level. Start with lower volumes (30-50%) to protect your hearing, especially when using headphones. You can adjust it while the tone is playing.

  4. 4.
    Play and Practice:

    Click the "Play" button to start generating the tone. The tone will play continuously until you click "Stop". Use this as a reference pitch for singing practice, instrument tuning, or ear training exercises.

  5. 5.
    Practice Matching Pitch:

    While the tone is playing, try to match it with your voice. Start with notes in your comfortable range, then gradually work on notes at the edges of your vocal range. Use our Pitch Detector tool to verify your accuracy.

🎤

Check Your Accuracy

Pitch Detector

Singing along with the tone? Use our real-time pitch detector to see exactly how accurate your matching is (in cents).

Open Pitch Detector
📊

Know Your Limits

Vocal Range Test

Don't know which notes to practice? Find your comfortable range first to avoid straining your voice.

Take Range Test

🎯 Vocal & Ear Training Exercises

⚡1. Tone Attack (Clean Onset)

A good singer starts notes cleanly without "scooping" up to the pitch.

Exercise: Set a comfortable note (e.g., C4). Click "Play" and listen. Then, stop the tone.

Take a breath, and try to sing that note immediately and accurately on the syllable "Ah" or "Mah".

Play the tone again to check if you started on the correct pitch.

🎯2. Pitch Matching (Intonation)

Developing the ability to match an external reference pitch is crucial for staying in tune.

Exercise: Play a random note. Listen for 3 seconds.

Sing the note while the tone is playing. Listen to the "beating" sound (wavering) - it slows down as you get closer to the pitch.

Verification: Use our Pitch Detector in a separate tab to see exactly how many cents you are off.

👂3. Ear Training & Intervals

Train your brain to recognize the distance between notes (intervals).

Interval Jump: Play C4. Stop it. Try to sing G4 (Perfect 5th). Then play G4 to check.
Scale Builder: Play C4. Sing the Major Scale (Do-Re-Mi-Fa-Sol-La-Ti-Do) up to C5. Then play C5 to see if you landed on the correct pitch.

The Physics of Sound

Understanding the physics behind sound can help you use the Tone Generator more effectively. Sound is created by vibrations that travel through the air as waves.

Frequency and Pitch

Frequency refers to how fast the sound wave vibrates, measured in Hertz (Hz). One Hz equals one vibration per second.Pitch is how our ears perceive frequency. Higher frequency = higher pitch. Doubling a frequency (e.g., 220 Hz to 440 Hz) raises the pitch by exactly one octave. This mathematical relationship is why octaves sound so consonant.

Waveforms and Timbre

The waveform determines the "color" or timbre of the sound.

  • Sine Wave: The fundamental building block of sound. It has no overtones, resulting in a pure, flute-like sound.
  • Square Wave: Contains the fundamental frequency plus odd harmonics. It sounds hollow and reedy, like a clarinet or old video game sound.
  • Sawtooth Wave: Contains both even and odd harmonics. It sounds buzzy and bright, similar to string instruments or brass.
  • Triangle Wave: Like a square wave but with softer harmonics. It sounds like a muted flute.

Frequently Asked Questions

A tone generator is used for creating precise audio tones at specific frequencies. Common uses include pitch reference for singing practice, instrument tuning, ear training exercises, audio equipment testing, and developing pitch recognition skills. Musicians and singers use it to practice matching pitch, while audio engineers use it for testing and calibration.

For vocal practice, start with notes in your comfortable range. Middle C (C4 at 261.63 Hz) and A4 (440 Hz) are popular starting points. Female singers often practice in the range of C4 to C6 (261-523 Hz), while male singers typically work in C3 to C5 (131-262 Hz). Use our Vocal Range Test to find your range, then practice notes within and slightly beyond it.

Sine waves produce pure, smooth tones with no harmonics - ideal for pitch reference. Square waves have a harsh, buzzy sound with odd harmonics. Sawtooth waves are rich in harmonics and sound bright and full. Triangle waves are softer than square waves but still contain harmonics. For pitch matching and vocal practice, sine waves are usually best because they're the purest tone.

Yes! The tone generator is excellent for instrument tuning. Use A4 (440 Hz) as your reference for standard tuning. Play the tone and match your instrument's A string or key to it. You can also use other notes like E, D, G, B for tuning different strings on a guitar. The generator provides a stable, accurate reference that won't drift.

Yes, but be careful with volume levels. Start with low volume (20-30%) and increase gradually if needed. Prolonged exposure to loud tones can damage your hearing. Never use maximum volume, especially with headphones. If you experience any discomfort, ringing in your ears, or hearing changes, stop immediately and consult a healthcare professional.

A4 = 440 Hz is the international standard concert pitch established in 1939. This means that the A note above middle C vibrates at exactly 440 cycles per second. Most orchestras, bands, and musical ensembles tune to this standard, ensuring that instruments can play together in harmony. Some historical periods used slightly different standards (like 432 Hz or 435 Hz), but 440 Hz is the modern standard.

The tone generator uses the Web Audio API, which provides very high accuracy. The frequency accuracy is typically within 0.01 Hz for most frequencies, which is more than sufficient for musical applications. This level of precision makes it suitable for professional use, instrument tuning, and serious ear training.

Absolutely! The tone generator is an excellent tool for ear training. Practice identifying notes by ear, recognizing intervals, matching pitch, and developing relative pitch. Start with simple exercises like matching single notes, then progress to intervals and scales. Combine it with our Pitch Detector to get instant feedback on your accuracy.

Some browsers pause audio when you switch to another tab to save resources. This is a browser feature, not a limitation of the tool. To keep the tone playing, keep the browser tab active or check your browser's audio settings. Chrome and Firefox typically allow background audio, but mobile browsers may pause it.

Currently, the tone generator plays tones in real-time but doesn't support downloading audio files. However, you can use screen recording software or audio capture tools to record the tone if needed. For most use cases (pitch reference, tuning, practice), real-time playback is sufficient.

Enhance Your Practice

Combine the Tone Generator with our other tools for comprehensive vocal training.

🎵 Pitch Detector🥁 Metronome🎤 Vocal Range Test🎹 Song Key Finder