KORG Module Pro vs Midiflow Splitter (Audiobus)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KORG Module Pro
This app provides a high-quality mobile sound module for iOS devices, offering professional piano and keyboard sounds. It's ideal for live performance and music production, allowing users to create studio-quality music anywhere with just an iOS device and a MIDI keyboard. Expandable sound libraries and integration with other music apps enhance its capabilities.
- High-quality piano and keyboard sound engines
- Six dedicated sound engines
- Ultra-low latency
- AUv3 support
- Set list function with score viewer
- Expansion sound libraries
- Performance recording and sharing
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The best sounds, available to everyone. Announcing a new high-quality mobile sound module app for iOS! • Achieved the #1 position*on the App Store* in the Top Paid Music App category *USA, UK, Japan, Germany, France, Italy, Canada and much more! Ideal for performance and music production, KORG Module is a high-quality sound module app for iOS that contains a professional sound library. With just your iPad/iPhone and a MIDI keyboard such as the new microKEY, you can play studio-quality keyboard and grand piano sounds anywhere. You can also use the sounds of KORG Module for the KORG Gadget music production app. Maintaining its position at the forefront of mobile music apps, KORG now offers you a new style of performance and production with KORG Module for iOS. FEATURE HIGHLIGHTS ● Stunningly high-quality piano and a full range of keyboard sound engines ● Six dedicated sound engines : Acoustic Piano/Electric Piano/Clav/Organ/Multi/Hybrid ● Ultra-low latency sound engine ● AUv3 support ● With just an iPad/iPhone and the new microKEY, you can enjoy great sound anywhere ● Mobile music production in tandem with KORG Gadget ● Convenient set list function with a PDF/image score viewer and music player ● Power-up even more with expansion sound libraries: TRITON Best Selection / Ivory Mobile Grand and more! ● Easily record your performances, and share song sketches on SoundCloud ● Integrating iOS technology that's indispensable for the mobile environment *** Stunningly high-quality piano and a full range of keyboard sound engines *** KORG Module has five dedicated sound engines, providing a number of high-quality sounds that can be played back on your iOS using the "NATIVE ENGINE”. These engines feature technology that was developed for KORG's historic line of workstations and synthesizers including: Acoustic Piano, Electric Piano, Clav, Organ, Multi, and Hybrid. Each display has carefully selected parameters, making it convenient and easy to adjust the sounds. We’ve also carefully ensured ideal playability and designed the system for ultra-low latency. Once you experience the quality of the sounds being produced from the slim body of your iPad, you'll agree that Module is radically different than anything else currently on the market. *** With just an iPad/iPhone and the new microKEY, you can enjoy great sound anywhere *** KORG Module and the microKEY are the best possible combination for a mobile performance environment. With the new microKEY which supports a damper, or the microKEY Air which provides a wireless connection via Bluetooth MIDI, your iPad can transform into a high-quality sound module. In your room, in a practice studio, or performing on stage,, it's easy to set up and immerse yourself in a superb playing experience wherever you are. Of course you can also use any MIDI keyboard that can connect to your iPad via Apple Lightning - USB camera adapter. The velocity curve function conforms the sound to your playing dynamics, so you'll be able to perform comfortably using any MIDI keyboard. Even if you don't have a MIDI keyboard, you can use the apps on-screen keyboard, phrase function, or MIDI player to play the sounds. The MIDI player can load and play standard MIDI files for your listening enjoyment. *** Mobile music production in tandem with KORG Gadget *** You can also use the high-quality KORG Module sounds inside KORG Gadget, the mobile music production app. If you have Module and Gadget, the five tools Salzburg, Montreal, Alexandria, Firenze, and Glasgow are added inside, allowing access the same way as Gadget. These five powerful gadgets will add even more variety to your music productions, raising your music to the next level. Whether for performance or for production, both of these apps deliver ultimate sound. More info at korg.com
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.
- 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
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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.
Screenshots
Verdict
The clearest difference is price: Midiflow Splitter (Audiobus) at $2.99 against KORG Module Pro's $39.99. Midiflow Splitter (Audiobus) also leads on in-app purchases (none vs 20) and iOS requirement (10.2 vs 15.6). KORG Module Pro's advantage is rating (4.6 vs 3.4) and review sentiment (64% vs 31%). On ads and device support 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
KORG Module Pro costs $39.99 and Midiflow Splitter (Audiobus) $2.99 up front. KORG Module Pro sells 20 one-off in-app purchases. Midiflow Splitter (Audiobus) asks for nothing beyond the download.
KORG Module Pro holds the better App Store score, 4.6 against 3.4. That said, the two scores are not equally well evidenced: KORG Module Pro has 1.2K ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 64% of KORG Module Pro's written reviews are positive against 31% of Midiflow Splitter (Audiobus)'s.
KORG Module Pro ships an update monthly, Midiflow Splitter (Audiobus) every 11 months. The most recent releases landed on October 18, 2026 and October 5, 2026 respectively.
| Parameter | KORG Module Pro | Midiflow Splitter (Audiobus) |
|---|---|---|
| Price | $39.99 | $2.99 — better |
| Rating | 4.6 (1.2K ratings) — better | 3.4 (10 ratings) |
| Positive reviews | 63.8% of reviews — better | 31.3% of reviews |
| Number of ratings | 1.2K — better | 10 |
| Update frequency | Monthly — better | Every 11 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 10.2 — better |
| Further details — not scored | ||
| Size | 1.7 GB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | KORG INC. | Johannes Doerr |
Customer experience
KORG Module Pro
Midiflow Splitter (Audiobus)
Bugs and requests
KORG Module Pro
Reported bugs
4 issues- Purchased content not appearing or disappearing
- Sustain pedal not functioning properly
- Polyphony issues causing notes to drop out
- Compatibility problems with newer iOS versions
Requested features
5 requests- Add split and layer functionality
- Implement MIDI learn capabilities
- Improve set list management with reordering and copying
- Add support for background audio and AUv3
- Provide better integration with other Korg apps
Midiflow Splitter (Audiobus)
Not enough reviews yet to summarise bugs or requests.
In-app purchases
KORG Module Pro
- Hybrid Synth Essential 2$3.99
- Future Synths$4.99
- London Symphonic Orchestra$6.99
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- Dream Pop$6.99
- Petrichor$6.99
- Shoulder Pads$6.99
- Space Western$6.99
- Wurley Electric Piano$9.99
- Mellow Tape Keyboard$9.99
- Soundiron Voice of Rapture Soprano$9.99
- Wild Kits$9.99
- Dreamy Synths$9.99
- Organ & Clav Collection$19.99
- TRITON Best Selection$19.99
- 80's Electric Piano$19.99
- Orchestral Dreams$19.99
- Classic EP-88M$19.99
- Ivory Mobile Grand$29.99
- Module Performance Expansion$29.99
- Ivory Mobile American D$29.99
Midiflow Splitter (Audiobus)
No in-app purchases
Questions
Is KORG Module Pro free?
Is Midiflow Splitter (Audiobus) free?
Which has better reviews, KORG Module Pro or Midiflow Splitter (Audiobus)?
Do KORG Module Pro or Midiflow Splitter (Audiobus) have ads?
Which is updated more often, KORG Module Pro or Midiflow Splitter (Audiobus)?
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