Comparison

Midiflow Splitter (Audiobus) vs KeyStage Lite

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Midiflow Splitter (Audiobus)

This MIDI effect app allows musicians to divide their external keyboard into multiple zones, assigning each zone to different synth apps. It offers powerful configuration options for split and layer setups, including octave transposition and controller assignment per synth.

Highlights
  • Create split and layer configurations
  • Assign key zones to synth apps
  • Transpose each synth app in octaves
  • Control active controllers per synth
  • Solo individual synth sounds
  • Supports multiple keyboards
Features
Currently charting
Read full description

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. MANAGAGE SPLIT POINTS AND ASSIGN ZONES 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. OCTAVE SHIFT AND CONTROLLER ASSIGNMENT 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. SOLO 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.

About

KeyStage Lite

This app acts as a master controller and audio mixer for keyboard players. It allows simultaneous control of multiple hardware and software instruments using various MIDI controllers. Organize songs into sections, customize instrument sounds, and manage MIDI mappings with advanced scripting capabilities.

Highlights
  • Control multiple MIDI controllers and instruments
  • Host AUv3 instruments and effects
  • Create complex keyboard splits and layers
  • Advanced MIDI mapping and scripting
  • Audio mixer with track control
  • Play and manage audio files
  • View PDF and JPG files
Read full description

KeyStage is a master controller, AUv3 host, and audio mixer app designed mainly for keyboard players. With KeyStage, you can simultaneously control any number of hardware and software instruments using any number of MIDI controllers in an organized way. Each project consists of sections (which corresponds to sections of a song). In each section you can change sounds and sound parameters of connected instruments, create complex splits and layers of your keyboard(s), change the functionalities of sliders/knobs/pedals of your MIDI controllers by creating advanced MIDI mappings, write your own scripts, view PDF and JPG files (e.g. sheet music) and lyrics, and much more. LIST OF FEATURES • Connect any number of MIDI controller to any number of MIDI instruments by creating tracks. • Load AUv3 instruments, effects, and MIDI Processors. • Assign any region of your keyboard(s) to any connected instrument. • Change velocity curve and velocity limits, and create velocity splits and layers. • Transpose notes and restrict notes to any key using pitch shifter. • Create mixer units to combine audio signals, turning KeyStage into an audio mixer. • With the player units, you can play wav, mp3, and m4a files, add marker points, automate actions (like play, stop, move to a marker etc.) using custom translators, or trigger certain events (like changing sections) when the player reaches a certain marker. • Input units allows you to use the microphone input, or the hardware inputs of a connected audio interface. • The Main Mixer view allows you to control volume levels and pans of all tracks, connect effect units, and connect units to mixer units. • Create instrument presets to easily change sounds of instruments by choosing patch names from patch lists. • KeyStage can also import Cubase Patch Scripts to automatically create instrument presets for your MIDI instruments. • KeyStage automatically detects new MIDI connections and recommends matching instrument presets from a database. • Simulate auto-sustain on any connected instrument. • KeyStage has a multi-track recorder, which lets you record any number of tracks simultaneously. • Change or filter any MIDI signal using custom translators. Use “Relative Control” switch to smoothly change the parameters of your instruments without any jumps. • Use XY control unit to send control change and pitch bend messages to any connected MIDI instrument. • Create setlists, quick access all the songs in a setlist from a setlist bar, move to previous/next songs from live console or using external MIDI. • Create virtual MIDI inputs/outputs for KeyStage. • Use virtual MIDI piano controller to play connected instruments. • View PDF and JPG files. Link any page or region of any file to any section. • Backup and restore your songs and global properties to Dropbox. • Map special actions (like changing octaves, switching sections, changing pages of a PDF file) to notes and controllers using custom translators. • You can write your own scripts in custom translators, which opens up endless possibilities. • Use MPE routing to control any MIDI instrument using MPE controllers like Seaboard. Use custom translators to change the functionalities of each MPE dimension. • KeyStage supports smooth transitions between sections. Pressed notes will continue to sound when you switch sections. You can access demo videos and video tutorials on my Youtube channel.

Screenshots

Midiflow Splitter (Audiobus)4 screens

Verdict

The call

The clearest difference is price: KeyStage Lite at Free against Midiflow Splitter (Audiobus)'s $2.99. KeyStage Lite also leads on rating (3.9 vs 3.4) and review sentiment (60% vs 31%). Midiflow Splitter (Audiobus)'s advantage is chart position (#188 vs unranked) and device support (3 vs 1). On ratings volume, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

KeyStage Lite is free to download; Midiflow Splitter (Audiobus) costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

KeyStage Lite holds the better App Store score, 3.9 against 3.4. Both are backed by a comparable volume of ratings — 10 and 8 respectively. Written reviews point the same way: 31% of Midiflow Splitter (Audiobus)'s written reviews are positive against 60% of KeyStage Lite's.

UpkeepUpdate frequency

Midiflow Splitter (Audiobus) ships an update every 11 months, KeyStage Lite every 3 months. Both last shipped on November 2, 2026.

Scorecard8 real differences · 3 level
Midiflow Splitter (Audiobus) versus KeyStage Lite: the parameters behind the verdict, then further details
ParameterMidiflow Splitter (Audiobus)KeyStage Lite
Price$2.99Free — better
Rating3.4 (10 ratings)3.9 (8 ratings) — better
Positive reviews31.3% of reviews60.0% of reviews — better
Number of ratings10 — better8
Update frequencyEvery 11 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#188 — better—
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS10.2 — better13.0
Further details — not scored
Size5 MB61 MB
Age rating4+4+
DeveloperJohannes DoerrAli Gokturk

Customer experience

Midiflow Splitter (Audiobus)

All ratings10 ratings
Positive60.0%
Neutral0.0%
Negative40.0%
Written reviews16 reviews
Positive31.3%
Neutral0.0%
Negative68.8%

KeyStage Lite

All ratings7 ratings
Positive71.4%
Neutral0.0%
Negative28.6%
Written reviews5 reviews
Positive60.0%
Neutral0.0%
Negative40.0%

In-app purchases

None

Midiflow Splitter (Audiobus)

No in-app purchases

None

KeyStage Lite

No in-app purchases

Questions

Is Midiflow Splitter (Audiobus) free?
Midiflow Splitter (Audiobus) costs $2.99, with no in-app purchases.
Is KeyStage Lite free?
KeyStage Lite is free to download, with no in-app purchases.
Which has better reviews, Midiflow Splitter (Audiobus) or KeyStage Lite?
KeyStage Lite is rated higher. Midiflow Splitter (Audiobus) averages 3.4 out of 5 from 10 ratings, while KeyStage Lite averages 3.9 from 8 ratings.
Do Midiflow Splitter (Audiobus) or KeyStage Lite have ads?
Neither Midiflow Splitter (Audiobus) nor KeyStage Lite shows ads.
Which is updated more often, Midiflow Splitter (Audiobus) or KeyStage Lite?
Midiflow Splitter (Audiobus) ships an update every 11 months, and KeyStage Lite every 3 months. Most recently, Midiflow Splitter (Audiobus) was updated on November 2, 2026 and KeyStage Lite on November 2, 2026.

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