Browser-based · No install · Web MIDI API

Edit your
vintage gear
from the browser.

Free tools for the Roland MT-32, Korg EA-1 and Roland TR-8. Connect your hardware via USB-MIDI and start editing — no software to install.

Free Chrome / Edge SysEx support No tracking No ads Open source spirit
Choose your editor
Roland MT-32

EMETERIO

Multi-Timbral Sound Module · 1987

Full SysEx editor for the iconic MT-32. Edit all 64 user timbres with complete LA synthesis control — WG, TVF, TVA, envelopes, bias points and more.

64 user timbre slots with folder management
Complete LA synthesis — all Partial parameters
TVF & TVA bias editors with interactive keyboard
SysEx import/export (.syx files)
Patch & Rhythm setup
Send All / Receive All via MIDI
Launch EMETERIO →
Opens in new tab · Requires Chrome or Edge with Web MIDI
📖 Read the manual
Korg EA-1

EA-1 LIBRARY

Electribe Analog Modeling Synth · 1999

Pattern library manager and live editor for the Korg EA-1. Store, organize and transfer up to 256 patterns — plus real-time synth control via NRPN.

256-pattern library with bank navigation
Full SysEx dump & restore per pattern
Live NRPN control — all synth parameters
Song mode with step sequencing
Pattern details: tempo, scale, swing, length
Sequential dump for TR-8 passthrough
Launch EA-1 Library →
Opens in new tab · Requires Chrome or Edge with Web MIDI
📖 Read the manual
Roland TR-8

HTR8ML

HTML TR-8 Machine Library · 2026

Browser-based step sequencer and pattern library for the Roland TR-8. Compose 32-step patterns with all 11 TR-8 instruments, store them in a persistent library, and transfer them directly to the TR-8 via MIDI REC mode — no software needed.

11 tracks · exact TR-8 note mapping (GM ch 10)
32-step sequencer with per-track synthesis
Persistent pattern library · export/import JSON
MIDI REC — record steps live from TR-8 pads
MIDI clock sync · master & slave modes
Configurable MIDI In/Out channels (1–16)
Per-track Tune, Duration, Attack & Volume
MIDI CC output for all knobs (CC 16–48)
Launch HTR8ML →
Opens in new tab · Requires Chrome or Edge with Web MIDI
📖 Read the manual
How it works
01

Connect your gear

Plug your MT-32, EA-1 or TR-8 via USB-MIDI or a MIDI interface. Make sure SysEx is enabled on your device.

02

Open the editor

Click Launch above. Chrome or Edge will ask for MIDI access — accept it. Select your device from the dropdown inside the editor.

03

Edit & transfer

Edit parameters in real-time or compose patterns from scratch. Transfer directly to your hardware via MIDI.

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