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Singing Pitch Trainer

Practice singing in tune with live feedback. Sing into your microphone and watch your voice as a line on a scrolling piano roll: follow scale and arpeggio exercises in any key, or sing freely and see how close you are to the nearest note. The cents meter shows whether you're flat or sharp, and the score tracks your accuracy.

Last updated:

You—— Hz
— cents
Target—— Hz
Accuracy—of sung time in tune
Average offset—cents (− flat, + sharp)
Notes hit0 / 0held in tune ≥ 40 %
Sung time0.0 svoice detected

Use headphones for the guide tone if you can, so the microphone hears only your voice. Everything runs on your device; the microphone sound is never recorded or uploaded.

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How to use the Singing Pitch Trainer

  1. Pick your voice range, key and scale. If unsure of your range, start with Alto for higher voices or Baritone for lower voices.
  2. Press Start microphone and allow microphone access. Headphones help if you use the guide tone.
  3. Follow the blue notes as they reach the line: each note plays a short cue, then sing it and hold it. Your voice draws a line: green means in tune, orange means off.
  4. Read the meter: the needle and the cents value tell you how far you are from the target and whether to sing higher (flat) or lower (sharp).
  5. Switch to Free singing to sing a song or improvise; the tool compares you with the nearest note of the chosen scale.
  6. Check your score and tighten the tolerance to ±10 cents as you improve.

Notes, frequencies and cents

Each semitone multiplies the frequency by 21/12 ≈ 1.0595, and an octave doubles it. The cents between a sung frequency f and a target note ft are 1200 × log2(f ÷ ft). Reference pitches (A4 = 440 Hz):

NoteFrequencyNoteFrequencyNoteFrequency
C3130.81 HzC4 (middle C)261.63 HzC5523.25 Hz
D3146.83 HzD4293.66 HzD5587.33 Hz
E3164.81 HzE4329.63 HzE5659.26 Hz
F3174.61 HzF4349.23 HzF5698.46 Hz
G3196.00 HzG4392.00 HzG5783.99 Hz
A3220.00 HzA4440.00 HzA5880.00 Hz
B3246.94 HzB4493.88 HzB5987.77 Hz

A 10-minute pitch practice routine

  1. Warm up (2 min): Five-note warm-up at Slow tempo, ±50 cents, on an "ah" or "oo" vowel. Open vowels give the clearest pitch reading.
  2. Scales (3 min): Scale up and down in a comfortable key. Watch where the line turns orange: many singers go flat on the way up and sharp on the way down.
  3. Intervals (3 min): Arpeggio and Scale in thirds train the jumps. Listen to the cue, imagine the note, then sing.
  4. Without help (2 min): Set Guide tone to Off and try Random scale notes. Use the reference-note button only if you get lost.

Tips for steadier pitch

  • Aim for the center of the note and hold it: a wobbling line usually means unsteady breath support rather than a bad ear.
  • If your average offset is consistently negative (flat), try more breath energy and a brighter vowel; if positive (sharp), relax the throat and avoid pushing.
  • Natural vibrato swings about ±20 to ±50 cents around the note 5 to 7 times a second. Practice straight tones first, then add vibrato and judge by the middle of the wave.
  • Tighten the tolerance from ±50 to ±25 and then ±10 cents as your score passes about 80 %.

Frequently asked questions

How does the pitch trainer know which note I'm singing?

It uses the YIN pitch detection algorithm on about 43 ms of microphone audio at a time. YIN looks for the period at which the waveform best repeats itself, refines it between samples, and converts the frequency to a note with MIDI = 69 + 12 × log2(f ÷ 440 Hz), with A4 tuned to 440 Hz.

What is a cent, and how close is in tune?

A cent is one hundredth of a semitone, so 100 cents separate neighboring piano keys. Most listeners notice a sustained note that is 10 to 25 cents off when it is compared with a reference, which is why ±25 cents is the default tolerance. ±10 cents is a demanding goal for trained singers; ±50 cents only checks that you hit the right note.

Why does the line jump or disappear?

Pitch can only be measured on voiced sounds with a clear periodic waveform. Breathy notes, whispering, consonants such as s and f, and silence give no reading. Background music, a TV or the guide tone leaking from speakers can also confuse detection, so a quiet room and headphones work best.

What does 'accept the right note in any octave' do?

When it is on, singing C4 for a C5 target counts as correct. That helps when an exercise sits outside your comfortable range or when a lower voice follows notes written for a higher one. Turn it off to practice hitting the exact octave.

How is the accuracy score calculated?

While a target note is active (or, in free singing, whenever you sing), the tool adds up the time your pitch is within the chosen tolerance and divides it by the total time you were singing. Notes hit counts the exercise notes you held in tune for at least 40 % of their length. Average offset shows whether you tend to sing flat (negative) or sharp (positive).

Which voice range should I choose?

Typical ranges are roughly bass E2 to E4, baritone G2 to G4, tenor B2 to B4, alto F3 to F5, mezzo-soprano G3 to G5 and soprano B3 to B5. Exercises start on the key's note in the lower half of the range. To measure your own range, use the Vocal Range Test.

Is my voice recorded?

No. The microphone signal is analyzed in memory frame by frame and immediately discarded. Nothing is stored or uploaded, and the microphone switches off when you press Stop or close the page.

Are all the tools on FreeToolCabin tested for quality and accuracy?

Yes! Every tool on our site undergoes automated Q/A testing in real browser environments to ensure high precision, correct output, and zero errors. If you happen to spot a bug or have a suggestion, please contact us at [email protected] and our team will review it right away.

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