Midiflow Splitter (Audiobus‪)‬ 4+

Divide the keyboard into zones

Johannes Doerr

Designed for iPad

    • 3.4 • 10 Ratings
    • $2.99



If you play your synth apps with an external keyboard, Midiflow Splitter is an essential tool for you. This MIDI effect app for Audiobus 3 lets you create split and layer configurations in an easy but powerful way. Thanks to Audiobus State Saving, everything can be saved and recalled when your show is about to start.

+ Add any number of split points
+ Assign resulting key zones to synth apps
+ Transpose each synth app in octaves
+ Choose which controllers (sustain, pitch-bend, etc.) should be active for each synth app
+ Solo sounds
+ Supports multiple keyboards

NOTE: This app requires Audiobus 3. Create at least two MIDI pipelines with your keyboard as input and different synth apps as output. Then insert this app into the effect ports.

Midiflow Splitter shows all synth apps as rows above the input keyboard. For each synth, you can select in which zone it should be active. The zones of the keyboard are defined by split points. Move, add, or remove split points to adjust the zones. If you are using multiple keyboards, they will show up with independent split point selectors.

An octave shift can be applied to each synth in your configuration. This is useful if you have assigned a sound to a zone on the lower part of the keyboard, but still want to trigger high notes. Just shift the notes by a couple of octaves, and you're done. You can also activate or deactivate controllers like sustain or pitch-bend for each synth app individually. That way, your controllers only affect the sounds you really want to manipulate, and keep the others unchanged.

After you have set up your split and layer configuration, you might need to tweak a synth's sound again. By activating "solo", all other synth apps will be deactivated so that you have the whole keyboard for this one sound. This is very handy if you have arranged the sound in a layer and quickly want to mute the other sounds for a moment.

What’s New

Version 1.0.6

Compatibility improvements for recent iOS versions

Ratings and Reviews

3.4 out of 5
10 Ratings

10 Ratings

Boo Kiker ,

I can split my guitar in half!

I play fingerstyle guitar and was looking for something that pick up MIDI notes from only the three high strings and ignore the notes from the lower strings. I use MIDI Guitar 2 to convert my guitar audio signal into MIDI notes. Things sometimes get a bit messy with fingerstyle playing through MIDI Guitar 2. It really can’t keep up at full speed. I realize that one remedy might be to have only my highest notes transmit MIDI signals and let the rest just be the sound of the guitar itself. MIDI Flow Splitter does just that! Also opens up a lot of possibilities for sound layering and maybe having one instrument play at one octave and another at the next octave and another at.... Really opens up the imagination!
I did encounter the problem of note freezing (feedback? infinite sustain) when adjusting the fader for Splitter on Audiobus. I remedied that by not touching that fader. I set my level with the MIDI Guitar 2 fader that comes before in the chain. I could adjust within the MIDI Guitar 2 app as well, I’d guess.

Voldrox ,

Life saver

This along with midi flow adaptor helped me split korg gadget and use different gadgets on various sections of my MIDI keyboard for LIVE performance.

TrinityTurret ,


This thing works really well when you first start using it—but in combination with Midiflow Adapter, when you touch any of the faders on the audio bus mixer screen, all the instruments go into a ‘continuous sustain mode’ then everything freezes up and you have to reboot the iPad to make it work again. I have sent emails and Messaged the developer with no response. So sad because this could’ve been such a wonderful app.

App Privacy

The developer, Johannes Doerr, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

More By This Developer

Midiflow Transposer (Audiobus)
Midiflow Monitor (Audiobus)
Midiflow Adapter (Audiobus)
Midiflow Channels (Audiobus)

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