QVERB

QVERB – Free Quadraverb Editor

QVERB is a free, browser-based editor and patch librarian for the Alesis Quadraverb and Alesis Quadraverb Plus. It speaks the unit's own MIDI System Exclusive dialect, so every reverb, delay, pitch, EQ, mix and modulation parameter can be edited from a full-size screen instead of two lines of LCD text and four buttons.

Nothing is installed and no account is needed. The editor runs entirely in your browser using the Web MIDI API, connects through any USB MIDI interface, and keeps your patches on your own machine. It works in Chrome, Edge and Opera over HTTPS; Safari and Firefox do not implement Web MIDI.

What you can do with it

• Edit all four effect blocks of the Alesis Quadraverb in real time over SysEx.
• Back up and restore programs before an ageing battery loses them for good.
• Load and save .syx, .ssx and JSON patch files.
• Browse curated guitar presets and cinematic soundscape banks.
• Use the unit even when the front-panel display has failed.

Supported hardware

QVERB targets the original Alesis Quadraverb (1989) and the Alesis Quadraverb Plus (1991). Both share the same core SysEx implementation — manufacturer ID 00 00 0E, device 02 — with the Plus adding sampling, ring modulation and a Leslie configuration. Other units in the Alesis line are not claimed as supported.

Start here

• Open the editorThe full virtual front panel and patch library.
• Back up your patchesDo this before the battery dies. It is 35 years old.
• Broken LCD? Edit over MIDIRecover a unit whose display has gone dark.
• Quadraverb SysEx referenceOpcodes, byte packing and the program data map.
• Help & setupWeb MIDI, cabling, channels and troubleshooting.
• About the projectWho built it and why.

More about the unit

For background on the manufacturer, see the Alesis article on Wikipedia. For manuals, firmware notes and a long-running archive covering the whole Alesis effects line, see quadraverb.nl.