# Midiflow Adapter (Audiobus) — Core MIDI-to-Audiobus

> Connects legacy Core MIDI music apps to Audiobus 3 via virtual ports. (iPhone/iPad app by Johannes Doerr.)

- Source: https://appshunter.io/ios/app/midiflow-adapter-audiobus/id1225817367 (this page in markdown: same URL + `.md`)
- Developer: [Johannes Doerr](https://appshunter.io/developer/622204117)
- Category: Music, Productivity
- Price: $1.99
- Rating: 4.20/5 from 5 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.2 · 5 MB
- Languages: American English
- Released: 2017-04-20
- Data updated: 2026-08-18
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/midiflow-adapter-audiobus/id1225817367/reviews.md

## What is Midiflow Adapter (Audiobus)?

This MIDI app for Audiobus 3 allows you to include music apps, which don't support Audiobus MIDI but only Core MIDI. It creates permanent virtual MIDI ports for input and output. After distinctly selecting each of those ports in your "legacy" music apps, they can receive and send MIDI from/to Audiobus 3.

+ Connect up to 10 receiving apps (like synthesizers)
+ Connect up to 10 sending apps (like sequencers)
+ Use multiple instances of this app in Audiobus

NOTE: This app requires Audiobus 3. Insert it into one or more MIDI input and output ports. Furthermore, this adapter only works with apps that allow you to select MIDI ports for sending and receiving. It won't work with apps that have no MIDI setup page.

IMPORTANT: Connecting apps via Core MIDI is an advanced topic. If you haven't done it before, please become familiar with it prior to downloading this app.

CONNECT YOUR "LEGACY" APPS TO AUDIOBUS 3
Audiobus 3 has introduced a powerful MIDI routing system that makes interconnecting MIDI apps a lot easier than it was before. However, not all music apps support this new system, yet. Midiflow Adapter makes those apps compatible, by translating between the "old" Core MIDI system and the new Audiobus 3. This, however, only works with apps that let you to select MIDI ports for input and output, or at least the MIDI channel. It is not enough if these apps create their own virtual MIDI port. 

SETUP FOR SYNTH APPS (RECEIVERS)
Midiflow Adapter creates 10 permanent virtual MIDI output ports. This means that you can use up to 10 music apps with this adapter. For setting it up, start Midiflow Adapter. Then, start your first synth app that you want to connect with Audiobus via this adapter app. Go to its MIDI settings and activate reception on the MIDI port called "MF Adapter Out 1". It is essential that you deactivate reception on all other ports. Now, go to Audiobus 3 and insert MF Adapter into a MIDI output slot. In the input slot, add any other app, like Midiflow Keyboard. When you switch to Midiflow Adapter, you can select which of your synth apps the MIDI data should go. In this case, it is already set to "Out 1", so you're ready to go.

For your second synth app, do the same steps, but select MIDI port "MF Adapter Out 2", and so on. Then, you can select it in the adapter app.

SETUP FOR SEQUENCER APPS (SENDERS)
The procedure is identical to the one for receiver apps (see above). However, you need to configure the MIDI output settings instead of the input settings. Midiflow Adapter creates 10 permanent virtual MIDI input ports for that purpose. They are called "MF Adapter In 1-10".

WORKING WITH CHANNELS
Some Core MIDI apps don't allow you to select the input/output ports, but only the MIDI input/output channel. In that case, they receive on all ports. The only way to selectively trigger them is to assign a unique channel to them. In Midiflow Adapter, you can then select this channel as input/output.

NON-COMPATIBLE APPS
If one of your music apps neither supports selecting the MIDI port nor setting the MIDI channel, you cannot use it with Midiflow Adapter.

## Key features

- Creates permanent virtual MIDI ports
- Supports up to 10 receiving apps
- Supports up to 10 sending apps
- Allows multiple instances in Audiobus 3
- Translates between Core MIDI and Audiobus 3
- Works with apps allowing MIDI port selection

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/midiflow-adapter-audiobus/id1225817367/reviews.md

### 5/5 — Le Midi Yoke de iPadOS...

*2021-01-27*

Complète l'implémentation Virtual Midi de certaines apps inachevées... et fonctionne très bien sans Audiobus.

### 1/5 — In der Theorie eine tolle Idee...

*2019-10-05*

...leider funktioniert die App auf meinem iPad (7. Generation) überhaupt nicht. Ich wollte sie nutzen, um das Signal einer MIDI-Controller-App, die nur ein einziges MIDI-Output-Ziel erlaubt, auf mehrere Apps aufzuteilen. Abgesehen von andauernden App-Abstürzen, die die Nutzung beinahe unmöglich machen, habe ich bis jetzt auch kein funktionierendes Setup zustande gebracht. Ob das nun eigene Unfähigkeit ist oder nicht kann ich schwer sagen, da ich das Gefühl habe, dass die App bereits im Hintergrund schon immer abstürzt. Ich hoffe da wird nachgebessert, denn die Idee der App ist super!

### 5/5 — Life saver

*2017-11-26*

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

### 5/5 — Extremely useful

*2017-04-29*

This is a very useful adapter for Audiobus 3, given that many synth apps are not (at least yet) fully compatible - I use it regularly.

## Frequently asked questions about Midiflow Adapter (Audiobus)

### What is Midiflow Adapter used for?

Midiflow Adapter is used to connect music apps that only support Core MIDI to Audiobus 3. It creates virtual MIDI ports, allowing these 'legacy' apps to send and receive MIDI data within the Audiobus 3 environment.

### Does Midiflow Adapter work with all music apps?

No, Midiflow Adapter only works with apps that allow you to select MIDI ports for sending and receiving, or at least the MIDI channel. Apps that create their own virtual MIDI ports without offering selection options are not compatible.

### How many apps can I connect with Midiflow Adapter?

You can connect up to 10 receiving apps (like synthesizers) and up to 10 sending apps (like sequencers) using Midiflow Adapter. You can also use multiple instances of the adapter within Audiobus 3.

### What is the price of Midiflow Adapter?

Midiflow Adapter is a paid app, priced at $1.99. This one-time purchase grants you access to all its features for connecting your music applications.

### Is Midiflow Adapter available on Android?

Based on the provided data, Midiflow Adapter is supported on iPhone, iPad, and iPod. There is no information indicating availability on Android devices.

### How often is Midiflow Adapter updated?

The latest version, 1.0.5, was released on May 7, 2024. This indicates a recent update, suggesting ongoing support and development for the application.

### What is the user rating for Midiflow Adapter?

Midiflow Adapter has a user rating of 4.0 stars based on 4 ratings. This suggests a generally positive reception from its users.

### Does Midiflow Adapter have ads?

No, Midiflow Adapter does not contain advertisements. As a paid application, it provides an ad-free experience for users.

## Version history (last 5 releases)

### 1.0.5 — 2024-05-07

Compatibility improvements for recent iOS versions

### 1.0.4 — 2020-12-01

Update for iOS 14

### 1.0.3 — 2019-11-28

Update for iOS 13

### 1.0.2 — 2018-06-15

Update for GDPR

### 1.0.1 — 2017-09-14

+ Fixes for iOS 11

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## More apps by Johannes Doerr

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All apps by Johannes Doerr: https://appshunter.io/developer/622204117

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-18.*