DX21 Editor & Librarian

Patch Base has the best Yamaha DX21 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 + DX21 Editor

Already own Patch Base 4 for Mac? Log in to buy the DX21 editor at the editor-only price.

Download Patch Base free on the App Store, then unlock the DX21 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

FM Voice Editor

Patch Base makes FM easy to work with by showing you the layout of the currently selected algorithm and the envelopes and settings of each operator. You can finally visualize what's going on inside of the DX21, and once you do, it's not that complicated. Everything is shown on a single screen, including the Pitch Envelope, LFO, and external control settings.

Bank Editor

Patch Base's Bank Editor let you change and organize the saved sounds on your Yamaha DX21. You can easily save a bank to a file for back up and storage, and import entire new banks in seconds.

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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