Free tool · no sign-up
Virtual melodica: blow into your microphone and play
Blow into your phone’s microphone and press the keys: the harder you blow, the louder and brighter the melodica. Hold several keys for a chord. No microphone? Hold the Blow button.
Virtual melodica
Play it by blowing into your microphone
Tomus listens only to how hard you blow — on this device. Nothing is recorded or sent anywhere. No microphone? Hold the Blow button instead.
Hold Blow (or Space) and press keys — or enable breath control above.
Try a challenge
Was this helpful?
How to play
Tap Enable breath control and allow the microphone. Tomus then takes about five seconds to learn your room: a moment of quiet, one note it plays itself (so it knows what its own sound does to your microphone), and one steady blow. After that, a note sounds only while you blow and hold a key — exactly like a real melodica, where the air does nothing until a key opens a reed.
Keep blowing and change keys: the melody moves without a new breath. Blow softer and the sound gets quieter and darker; blow harder and it gets louder and brighter. To repeat a note, take a new breath or say a short “tu” into the microphone — the way wind players separate notes.
On a phone, hold the bottom edge (where the microphone is) a few centimetres from your mouth and blow across it. Headphones help: the instrument then cannot hear itself.
Your microphone stays on your device
Breath control measures only how loud the low rumble of your breath is, many times a second, inside your browser. No sound is recorded, stored or sent anywhere, and the microphone turns off when you leave the page or press Microphone off. Your browser shows its own indicator while it is on.
Without a microphone
The Blow button plays the same instrument: hold it and press keys. Touch higher on the button to blow harder. On a computer, hold Space to blow (Shift + Space for full strength) and play the keys from the keyboard: Z–, for C4–C5 and T–] for C5–C6, the same layout as the virtual piano. Arrow keys move between keys and Enter holds the one in focus.
The keyboard
Two octaves, C4 to C6. A student melodica usually has 32 keys, F3 to C6; on a phone a row that long would make every key too thin for a finger, so Tomus keeps the two octaves every song here needs. On a narrow screen they are stacked: the lower octave below, the upper above.
Songs to try
Hold a long note, Hot Cross Buns, Mary Had a Little Lamb, Ode to Joy, Happy Birthday. Each is shown note by note on the keyboard; play the marked key to move on. When you finish, replay what you played, and send the link to a friend — it opens the same song and lets them hear your take. Every tune is in the public domain.
The sound
Recordings of a Hohner melodica by fese on Freesound (pack “Hohner Melodica”, 2006), used under the Creative Commons Attribution 4.0 licence: nine notes, retuned to equal temperament, looped so a note lasts as long as your breath, and compressed to about 250 KB. They load once the page is ready. Until they have, a synthesised reed plays the same notes.