iPhone MIDI Controller Setups: Play From the Phone or Into It

Search for an iPhone MIDI controller and two different setups come back mixed together: apps that turn the phone into the controller, and keyboards that plug into the phone to play GarageBand.

That’s why one result offers an app and the next a keyboard, and the hardware for one setup won’t help with the other.

Once you know which way the notes travel, each setup comes down to one app and one connection that Apple or the app’s maker documents.

The steps below follow Apple’s Logic Remote, GarageBand and Audio MIDI Setup guides and Hexler’s TouchOSC manual, plus Apple’s adapter pages for the plug-in route.

Start with the table that tells you which setup you’re after, then jump to its steps.

Which iPhone MIDI Controller Setup Do You Need?

Those two setups split on one question: does the iPhone send the notes or receive them? To play software on a Mac or PC from the phone, the iPhone is the controller, and to play GarageBand on the phone from real keys, the keyboard is.

Google’s top results for this search are mostly about apps for the first two rows, so those come first.

Can You Use an iPhone as a MIDI Controller?

Those first two rows are the phone-as-controller route. Yes, through an app: Apple’s Logic Remote controls Logic Pro and GarageBand on a Mac, and Hexler’s TouchOSC sends MIDI to other music software through its Bridge program (Logic Remote guide, TouchOSC manual).

A phone screen is cramped for keys, and our guide on how to use an iPad as a MIDI controller covers the same apps with more room. Android owners should follow this Android walkthrough instead.

How Do You Connect Logic Remote on an iPhone?

Logic Remote is the shortest route when your music lives in Logic Pro or GarageBand on a Mac. Apple says it connects over Wi-Fi or with a USB-C or Lightning cable:

1. Put the Mac and the iPhone on the same Wi-Fi network, or connect the cable.
2. Open Logic Pro or GarageBand on the Mac, then Logic Remote on the iPhone.
3. Choose the Mac in the connection dialog.
4. Click Connect in the alert on the Mac.

Later connections happen automatically, and Apple’s fixes for Wi-Fi dropouts include switching to a Lightning cable. To play, turn the phone to landscape and tap View, then Keyboard, which has octave buttons, a lockable Sustain control, scales, an arpeggiator and Chord Strips (Logic Remote keyboard guide).

What About Ableton Live, FL Studio or Other DAWs?

Logic Remote connects to a Mac running Logic Pro or GarageBand, so any other DAW needs a different MIDI app on the phone. TouchOSC is one, and Hexler says its TouchOSC Bridge program works as a virtual MIDI interface, carrying MIDI over the network or, on iOS devices, over a USB cable.

Hexler’s tutorial boils down to four steps (Hexler):

1. Install and launch TouchOSC Bridge on the computer; its icon appears in the macOS menu bar or the Windows task tray.
2. In TouchOSC, open Connections, then Bridge, enable Connection 1 and Browse to the computer, or pick <USB> for a cable.
3. On the MIDI tab, enable Connection 1 and choose Bridge 1 as Send Port and Receive Port.
4. Load an example layout and press play to enter control surface mode.

Hexler’s free Protokol tool then shows whether MIDI arrives, and on Windows, Hexler warns that the firewall can block a network setup. If your app speaks Bluetooth MIDI instead, a Mac connects to it in Audio MIDI Setup under Window > Show MIDI Studio > Configure Bluetooth, and Apple says Bluetooth MIDI between a Mac and an iOS device on iOS 8 or later with Bluetooth LE hardware works both ways (Audio MIDI Setup guide).

How Do You Connect a MIDI Keyboard to an iPhone?

That’s the phone as the controller, and the other setup reverses it, with a keyboard playing the phone. The connector decides the cable: an iPhone 15 or later has USB-C, so a keyboard with a USB-C connector joins it with a USB-C cable, while a Lightning iPhone needs an adapter (USB-C support page).

For a USB-A cable on a USB-C iPhone, the Apple USB-C to USB Adapter connects standard USB accessories to an iPhone, Apple says (adapter page).

the Apple USB-C to USB Adapter

Fits: iPhone 15 and later

Connection: USB-C plug to a USB-A socket

Made by: Apple

✓ Apple lists iPhone 15 and later as compatible✓ Takes a standard USB device's USB-A cable, per Apple✗ No charging port, so a keyboard that needs more power needs its own supply

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For a Lightning iPhone, the Apple Lightning to USB 3 Camera Adapter lists iPhone 5 to iPhone 14 as compatible and adds a Lightning port for a USB power adapter, which Apple’s page says lets you connect USB peripherals such as audio and MIDI interfaces (camera adapter page).

the Apple Lightning to USB 3 Camera Adapter

Fits: iPhones with a Lightning port

Ports: USB 3 plus a Lightning power port

Made by: Apple

✓ Apple lists Lightning iPhones from iPhone 5 to iPhone 14 as compatible✓ Lightning port takes a USB power adapter✗ Lightning iPhones only

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Power can be the catch: Apple’s Logic Remote guide says you can connect some class-compliant USB MIDI devices to an iPhone to play its Touch Instruments, and that some may need an external power supply (Logic Remote MIDI guide). Korg, for one, says its USB bus-powered microKEY2 supports the iPhone through Apple’s Lightning to USB camera adapter (Korg).

IK Multimedia says its iRig Keys 2 works with iPhone and includes Lightning, USB-C and USB-A cables (IK Multimedia). Our list of the best MIDI keyboard for iPad compares compact boards, so check each maker’s iPhone support before you buy.

Can You Play GarageBand on iPhone With a Bluetooth MIDI Keyboard?

Bluetooth drops the adapter from that setup entirely. Yes: Apple says GarageBand for iPhone connects a compatible Bluetooth MIDI device to play Touch Instruments, set up inside the app (GarageBand guide):

1. Tap the Settings button in the control bar (on iPhone SE, then Song Settings).
2. Tap Advanced, then Bluetooth MIDI Devices.
3. Tap the keyboard’s name and turn on its Connect switch.

Korg says its microKEY Air connects wirelessly to iPhone music apps such as GarageBand and lasts a month between battery changes (Korg). Once a keyboard is connected, Burton Acoustix’s GarageBand iPad walkthrough covers recording with it.

To choose the keyboard first, our roundup of Bluetooth MIDI keyboards worth pairing with an iPhone compares five boards and three adapters by what their makers document.

The Bottom Line

The direction of the notes decides the setup: an app sends them from the phone, or a keyboard sends them into it. On a Mac, start with Logic Remote; for other DAWs, use TouchOSC and Bridge; and for GarageBand on the phone, match the adapter to the connector or pair Bluetooth MIDI inside the app.

Frequently Asked Questions

Can you use an iPhone as a MIDI keyboard?

Yes, through an app. Logic Remote’s Keyboard Touch Instrument plays software instruments in Logic Pro on a Mac, and TouchOSC layouts send MIDI messages to other music software.

Does GarageBand on iPhone work with a MIDI keyboard?

The GarageBand guide for iPhone documents Bluetooth MIDI keyboards, under Settings, Advanced, Bluetooth MIDI Devices. For a USB keyboard, check that its maker lists iPhone support, as Korg does for the microKEY2.

Do you need an adapter for a MIDI keyboard on an iPhone 15?

Not if the keyboard has a USB-C cable, because Apple says USB-C devices connect with a USB-C cable. A USB-A cable goes through Apple’s USB-C to USB Adapter.

Is the iPhone’s touch keyboard velocity sensitive?

In GarageBand it can be. Apple says the Keyboard’s touch sensitivity has four levels under Track Settings, Velocity Sensitivity, so notes get louder or softer with how hard you tap (GarageBand keyboard guide).