D-550 Editor & Librarian

Patch Base has the best Roland D-550 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 + D-550 Editor

Already own Patch Base 4 for Mac? Log in to buy the D-550 editor at the editor-only price.

Download Patch Base free on the App Store, then unlock the D-550 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

Voice Editor

A D-550 voice is made up of 2 Tones, each containing 2 Partials. If that's ever felt confusing, Patch Base clears it up quickly. With the Voice Editor, you can see the structure of your sounds and easily understand what's going on:

Visualize all of the different parameters in a Voice
Edit any parameter without any menu diving
See the settings of each Tone and Partial on one screen
Copy/paste Partials and Tones for faster sound design
Copy/paste envelopes for ease of editing
Parameter controls are dynamically enabled and disabled to show how different sound settings affect one another

Bank Editor

Edit and organize the 64 sounds stored in your D-550's memory. Patch Base gives you direct access to the bank, so you can organize voices 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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