JD-990 Editor & Librarian

Patch Base has the best Roland JD-990 editor and librarian available for Mac and iPad. Edit any parameter, organize patches, create random patches, and more.

Patch Base for:

Mac iPad

Try out Patch Base 4 for Mac free for 7 days. Every editor is available as a one-time purchase, or get them all with the All Access subscription — one monthly or annual price for the whole collection.

Download Patch Base 4 for Mac Buy Patch Base 4 + JD-990 Editor

Already own Patch Base 4 for Mac? Log in to buy the JD-990 editor at the editor-only price.

Download Patch Base free on the App Store, then unlock the JD-990 editor with an in-app purchase — or get every editor with All Access.

Patch Base for iPad in the App Store →

Free to download, and free 7-day All Access trial.

iPad Screenshots

The Roland JD-990 is a powerful multi-timbral synthesizer module capable of playing 7 voice parts and 1 drum kit at once. Patch Base gives you easy editing of every voice and drum parameter inside the JD-990, enabling you to harness everything this little box can do.

Voice Editor

Each Voice in the JD is comprised of 4 Tone layers, each with its own sample, pitch, filter, and amp envelopes, and LFOs. Additionally there are 7 effects units including chorus, delay, and reverb. Patch Base lets you control all of it:

Quickly browse all the internal samples in the JD-990
Easily browse and use the additional sounds on any PCM card you have installed
View either an entire Tone at once, or "palette" mode letting you see all settings of a particular section (Pitch, Filter, Amp, etc) across all 4 tones
Copy and paste envelopes for easy editing
Copy and paste entire Tones to mix and match layers, or thicken up your sounds
Use any of the effects in the JD, and fine-tune their parameters
Get a bird's-eye view of the dozens of parameters that make up an JD voice patch

Rhythm Editor

Design your own custom drum kits with Patch Base's Rhythm Editor for the JD-990. Only dedicated menu divers would want to do this without an editor, but with Patch Base, it's simple. You can design 61 separate drum sounds per setup:

Each drum sound uses its own sample, with tuning and pitch envelope
Access the multi-mode filter for every sound, with its own envelope
Copy/paste entire drum sounds to create multiple variations per kit
Copy/paste envelopes for easy editing

Performance Editor

The Performance is where all the parts of the JD-990 come together. With Patch Base you can easily edit all 8 Parts:

Make high-level sound adjustments to the level and panning
Set your MIDI Channels and configure outputs for every part
Edit the Performance effects

Bank Editors

Edit and organize the 64 voice patches and 16 performances stored in your JD's memory. Patch Base gives you direct access to the banks, so you can organize patches and back them up to files on your device.

Patch Librarian

Save patches and banks as files

Patch Base saves files as sysex that can be sent to your synth by Patch Base or any general-purpose sysex transfer app.

Organize your sounds

Create folders to organize your patches and banks on iPad or Mac.

iCloud integration

Optionally use iCloud to make your patch files accessible on any iCloud-connected device, and to sync between Patch Base on Mac and iPad.

Import sysex files

Import existing patch and bank sysex files. On Mac, drop your files into the browser. On iPad, import using iCloud or the Files app.

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