Play Trombone Online — Free Virtual Slide Trombone with Brass Tone
Play a virtual slide trombone in your browser: a chromatic brass voice over the slide range, real positions, keyboard and MIDI, record and download.
The board runs low to high like the slide moving out: Z–/ play the lower positions, Q–P the upper ones. Hold a note to hear the brass bloom.
How to Play in Four Steps
- Tap a position on the slide — the left end is the lowest note, the bell is the top.
- Hold a note rather than tapping it: brass speaks after a short lip scoop, which the voice reproduces.
- Mark a phrase, then play it back as a sequence to hear the slide movement in context.
- Connect a MIDI keyboard for a longer line, then record and download the take.
A Short History of the Trombone
The trombone grew out of the sackbut, a slide trumpet used in Renaissance churches and courts from the fifteenth century. Its slide let a player move smoothly between pitches, which made it the natural instrument to double voices in choirs.
By the nineteenth century it was a fixed member of the orchestra — Berlioz wrote for it with unusual care — and by the twentieth it had become a jazz voice: J.J. Johnson made the horn speak bebop, and it has been in brass bands, ska and film scores ever since.
Acoustically, the player buzzes their lips into a mouthpiece and the slide changes the tube length, so pitch and tone colour are set by the embouchure as much as the slide — reproduced here with a lipped scoop, a filter bloom and a delayed vibrato.
Trombone Quiz
0 / 3 · Score
How does a trombone change pitch?
How many slide positions are there?
What is the Renaissance ancestor of the trombone?
Frequently Asked Questions
Tap a position on the board, tap a note in the strip, use the two keyboard rows, or connect a MIDI keyboard. Each plays the same brass voice with a short lip scoop into pitch.
A slide lengthens or shortens the tubing, which lowers or raises the pitch. Seven slide positions plus the harmonic series give every semitone without any valves.
Because the slide positions repeat at each harmonic. In first position the horn gives Bb, F, Bb, D, F and so on; each higher harmonic starts a new set, which is what fills in the chromatic scale.
A real slide player finds the pitch by ear after the attack, so the sound scoops upward. This simulator models that scoop on purpose; without it the voice sounds like an organ.
Bb2 to F4 — the middle and upper-middle register where most written trombone parts live, and where a browser speaker can reproduce the fundamental.
The sackbut, a Renaissance and Baroque slide trumpet with a narrower bore and a gentler tone. The modern instrument kept the slide and grew the bell.
No. It is central to jazz, where J.J. Johnson made it a bebop voice, and to brass bands, ska, funk and film scoring.
Yes. Record, play, stop and download — the browser writes the take from the master bus, with no upload and no account.