*** Now with AUv3 support! ***

This is a simple yet powerful iOS app that performs as a polyphonic audio synthesizer. Under the hood, It uses an AVAudioUnitSampler to generate the audio output when you touch one or more keys. The sounds that are available come from soundfont files, such as those available online for free (and of variable quality).

To use, simply select a SoundFont name in the left list, then a patch name on the right and start playing. Some additional hints to get going:

• Add a SoundFont (SF2) file that you have downloaded onto your iCloud Drive. Press the "+" button and then locate the file to add. You can always change the display name of the SoundFont by swiping right. And you can remove a SoundFont that you no longer want by swiping left on its name.

• Swipe right on a patch name to make it a favorite. Favorited patches have a star next to their name. You can edit the name of the favorite by again swiping right and selecting the edit action. You can remove a favorite by swiping left and selecting the remove action.

• Touch the labels at either end of the black bar to change the range of the keyboard. You can go as low as "C0" and as high as "C9". You can also change the range by swiping left/right on the black bar. Note that this ability does not exist in the AUv3 extension -- use the native application keyboard controls to achieve the same results.

• Switch between the soundfont patches listing and the favorites view by double-tapping on the patch name in the black bar above the keyboard. You can also swipe left/right with two fingers in the patches and favorites views to switch to the other view.

• In the view of favorites, you can edit a favorite button by double-tapping on it. You can rearrange the favorite buttons with a tap-and-hold gesture.

Finally, you can check out the source code! Go to the Support URL to find out more.

What’s New

Version 2.8.0

Only expose currently usable parameter setting (gain, tuning, and stereo pan) in AUv3 hosts. Fixed subtle layout warning. Improved SF2 loading feedback messages.

Ratings and Reviews

4.4 out of 5
8 Ratings

8 Ratings

Diana.McCall ,

Just works

I'm loving this app because it just works. No fancy features. Using it as AUv3 in AudioBus, you can add FX AUs, run multiple instances with different MIDI control, etc. And you can add downloaded Soundfont files which have some very nice instruments.

Developer Response ,

Thanks for taking the time to review! I really appreciate it.

Hucklebucks ,

Please Make into AUv3 Instrument!

This is a very nice app for loading and playing soundfonts. If the developer would make it into an AUv3 instrument which can be loaded up in DAWs, it would be amazing. Especially if it remembers its state when reopening the DAW.

Developer Response ,

*Latest version now has AUv3 support* Thanks for taking the time to review! I have begun work on an AUv3 instrument, so hopefully in the next month or two something will be available.


Wow, just wow.

I’m late but this is my first encounter with sound fonts. This about to completely change my workflow for the better.

After messing around, the only addition I see fit (AS LONG AS IT DOESN'T INCREASE THE CPU USAGE) would be an envelope controller. Being able to control the attack/release/decay/ sustain is all this really needs.

Edit: and the ability to glide notes

Developer Response ,

Thanks so much for taking the time to review. Glad you are enjoying it!


Brad Howes
199.6 MB

Requires iOS 12.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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