How it works
Sound is analyzed on your own device, in real time. Audio is never recorded or sent to any server. The app asks the browser for raw sound without noise or volume filters, so long notes aren't cut off, and it detects the pitch (frequency) several times per second.
What each exercise checks
| Exercise | What the app checks | What you see |
|---|---|---|
| Playing a note or song (all) | whether the note you played is the one asked for, and how sharp or flat it is | the app only moves on when you get it right; stars based on the share of notes right on the first try |
| Tuner | the note played and its distance from center, in cents | a needle from “flat” to “sharp” |
| Tuning the guitar | each string, one at a time | the string turns green when it settles in the middle |
| Long note (flute) | how long you hold it and whether the pitch stays steady | seconds and goals for 1 to 3 stars |
| Loud and soft (flute) | the volume in each part and whether the pitch drifts as the volume changes | a tip on what to adjust |
| Staccato and double tonguing (flute) | how many separate notes you played, on the click | a note count |
| Slurred / legato | whether the sound stopped between notes | a warning when the air cut off |
| Chords (guitar and piano) | whether the chord's notes are sounding on each strum or press | a dot for each clean chord and the notes it heard |
| Strumming and chord changes (guitar) | whether each strum landed on the metronome beat (within about 0.15 seconds) | “Perfect”, “Nice”, “Missed”, points and streak |
What the app doesn't check yet
- Both hands together on piano (melody and accompaniment at once): the app checks chords, but songs are one hand at a time.
- The rhythm of melodies: in songs the app waits for you to hit the note and doesn't grade its length. Rhythm is graded in the strumming, chord-change and staccato exercises.
- Posture, fingering and bowing: it can't see you, only hear you. An alternate fingering that produces the same note is accepted.
- Tone quality: it measures pitch and volume, not whether the sound is “beautiful”.
- Muted strings in a chord: the app checks the chord's notes; if a string is muted but that note rings on another string, it may pass.
For a good reading
- A quiet room, with no TV or music in the background.
- The phone about 30 to 50 cm (1 to 1.5 ft) from the instrument, microphone facing it.
- For rhythm exercises, use the device speaker or wired headphones: Bluetooth delays the sound and throws off the timing.
- Works in current browsers with a microphone: Chrome, Edge, Firefox and Safari, on phones (Android and iPhone) and computers. The browser asks for permission the first time.
- Very high notes coming out an octave up or down? Turn on “Accept another octave” in the Practice tab options.
Try it now
The quickest way to see the microphone at work is the tuner: open it, allow the microphone and play or sing a long note.
Written by the Dedilhado Vivo team, based on what the app does today.
Practice free in the app
The app shows the fingering for every note as you play and checks you through the microphone. Free, no sign-up.
Open the app →Frequently asked questions
Does the app record my voice or instrument?
No. Sound is analyzed on the device and discarded immediately; nothing is recorded or sent.
Does it work with a digital keyboard?
Yes, through the microphone, and also over USB (MIDI) on a computer, which is even more accurate.
Why doesn't it recognize the note sometimes?
The usual reasons are background noise, a sound that's too quiet, or a note coming out an octave higher. Move the device closer and play firmly.