MIDI Studio

A sequencer built for MIDI, running in your web browser.

Nothing to install. Your songs and the sound bank stay inside the browser; nothing is sent anywhere. New to sequencing? Read Getting started; every operation is listed in the help. The app's language can be switched between Japanese and English in the View menu.

The MIDI Studio screen: the track view on top, the piano roll below — Track view and piano roll

Visual mode

Watch the song as it plays: a Recomposer-style event list, a piano roll of every track, or one keyboard per track.

Visual mode's piano roll, every track in its own color — Piano roll

Visual mode's keyboards, showing the keys each track is playing — Keyboards

Edit like a DAW

Tracks and clips, a piano roll, Velocity / CC / Pitch Bend lanes. Quantize (strength and swing), humanize, bulk velocity edits.

Edit by the numbers

A Recomposer-style list: enter MEAS / STEP / NOTE / ST / GT / VEL from the PC keyboard. ♩=48 display is supported.

Play and record

Play with the PC's letter keys or a MIDI keyboard. Real-time recording and step input. Everything works without a numeric keypad.

Watch

Visual mode shows the performance as a scrolling event list, an all-tracks piano roll or keyboards, with a choice of color schemes.

GM / GS MIDI files

Import and export SMF. GS SysEx and unknown events are kept, never dropped. Export to WAV as well.

Entirely in the browser

Sound comes from a SoundFont (GeneralUser GS by default) through Web Audio. Save to the browser or to a file. Nothing goes to a server.

What it does

Create, move, duplicate, split and resize clips; reorder tracks; drag the loop range
Piano roll, drum editor (lanes and pads named by instrument), list editor, mixer, conductor (tempo, time signature, key signature, markers)
DAW-style shortcuts (L for loop, M / S for mute / solo, Q for quantize and more) and PC keyboard, drum pad and step input modes
Import SMF format 0/1, export format 1, export WAV, save .midstudio projects, autosave inside the browser
Two sample songs included (VISION (GS Version), Merry X'mas For You!), ready to play right after launch
Light / dark themes; Japanese and English UI. Runs in recent versions of Chrome, Edge, Firefox and Safari (MIDI keyboards need a browser with Web MIDI)

This software is under development. GS SysEx is kept and editable, but the patches and effects of a real Roland SC-55 / SC-88Pro are not reproduced.