MIDISynth Circuit provides full editing of the two synth engines on the Novation Circuit Synthesizer.
Patches can be retrieved and uploaded to the Circuit using the editor and transferred to a computer or iCloud destination for archiving. Using this mechanism it is also possible to upload patch sets, sessions and samples available from Novation Components.

Full control of the session sections of the synth are provided and presets can be saved and recalled(due to technical limitations, no interaction for Novation Components is available for session settings).

Additional functionality is available in the form of in app purchases for random generation/tweaking of patches, morphing between patches, 4 XY user-definable XY controls and 16 user definable controls.

The 4 XY controls, 16 custom controls and the macro controls are brought together on the performance screen for easy control of your favourite parameters whilst performing.

Please note this app requires a Novation CIrcuit to operate - it goes not generate any sound itself.
Please note that due to technical limitations this app requires a USB connection to Circuit in order to operate correctly.
Please note this is an independent product and there is no link or affiliation with Novation Music.

What's New

Version 1.2.7

Default filename provided for saving banks
When saving banks last loaded/saved filename is used by default
Added load/save success popups
Phone mode is now stored with settings

Fixed couple of issues with midi sets dirty option not operating correctly
Fixed issues on patch viewer screen
Fixed issue with drum pans not updating when changed on synth

Customer Reviews

Great as a way to get inside the nova synths but...


Two features which I really wish this thing had.

1. Ability to show up as an IAA instrument. This way it could be controlled via something like modstep.

2. Midi learn. So one could arbitrarily assign knobs to individual synth control from an external midi controller or from another app like modstep.

The reason midi learn is crucial is that this UI is very cramped. If you are on an iPad midi, forget about it. The controls are too tightly placed. It makes using the app very annoying since you are likely to hit neighboring controls.

Good start. Needs a little improvement.

Must have for circuit owners, but needs work


Developer is updating for new iOS and devices. Initially didn't work, but the beta does. Offers in app upgrades that should be free or included in my opinion as $20 is already quite expensive.

Once the "issues" are ironed out... (there will be more stars)


Over all Very promising and the core functionality is there and easy to use.

Looking forward to reviewing once the "issues" the developer acknowledges he knows exists are dealt with... 3 stars for releasing the app/Iap's with those "issues" .

One of the issues is synth morphing on synth 2 gives no visual indication of the morph the way it does on synth 1... I thought he developer knew about this already and so did not contact him.

Developer Response

Hi there. Can you tell me about the issues that you are having - I don't recall being contacted about anything. thanks

Hi, thanks for the info - was not aware of that issue. If you can send details of any others to I'd be grateful - I'm working on the next update currently. thanks


Lee Huddleston
9 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2017 Sigabort
In-App Purchases
  1. IAP Bundle $12.99
  2. Circuit Mono Station $5.99
  3. Performance Features $9.99


  • Family Sharing

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

You May Also Like