Please refer to the product page of Cubasis for the up to date list of compatible hardware.

Inter-App Audio

Inter-App Audio is a universal routing system for iOS, allowing you to route audio, MIDI and effects between Cubasis (host) and compatible node apps in realtime. There are three basic types of nodes:

  • Effects can be set as insert or send effects.
  • Instruments are assigned to a MIDI track and automatically receive MIDI from Cubasis.
  • Generators are inputs for audio tracks.

To use an Effect node in Cubasis, follow these steps:

  • Select the track you wish to add an effect to.
  • Open the track Inspector and select the the Insert or Send effects panel.
  • Tap one of the slots and choose Inter-App. A list of available effect apps will appear. Select one to assign it.
  • Tapping the app icon in the effect slot will take you to the app. From here you will be able to customize the effect and control Cubasis remotely.

To use an Instrument app, follow these steps:

  • Tap the instrument icon on your desired MIDI track.
  • Open the instrument browser to the left and expand the category Inter-App. Select an instrument of your choice.
  • Once the instrument app is connected to Cubasis, the icon lights up and you are able to play the instrument on your Cubasis keyboard like any other. Tapping the icon will take you to the app directly for customization of the sound.

    Note: Instrument node apps cannot send MIDI information to Cubasis via Inter-App. To record MIDI from another app, use CoreMIDI instead.

To use Audio input, do the following:

  • Select an audio track.
  • Open the track Inspector and open the Routing panel.
  • Tap Input source (Mono by default) choose Inter-App. A list of available apps will appear.
  • After assigning an app, its icon and name will appear in the input slot. Tap the icon to switch to the app.
  • From here you can remotely record the generator's audio into Cubasis. Some generator apps can also act as instruments; however, they may only be connected once.

    Note: Monitoring must be enabled on Inter-App audio tracks. Background Audio must be enabled for both apps.


Limitations of Inter-App Audio routing:

  • The maximum number of Inter-App Audio connections depends on the device. Connections are severed without notice by iOS in low memory situations.
  • Connection sometimes fails if the node app is already running due to a bug in iOS 7. As a rule of thumb, quit all audio apps, launch Cubasis and then connect Inter-App Audio nodes. Don't launch node apps manually before launching Cubasis.
  • Connected node apps don't always appear in the iOS multitask mode when you double tap the home button. This is an iOS 7 issue which can lead to connections failing. As a workaround, launch the node app manually from the home screen, then doube tap the home button and swipe up to quit it.
  • Cubasis can only interact with node apps via Inter-App Audio; it cannot be selected as an input in another host app.
  • Inter-App Audio routing performs best with a sample rate of 44.1 kHz. Other values might lead to crackling noise.
  • Even if an app is listed multiple times, only a single connection can be made to it at a time.


Audiobus is an audio transfer app, allowing you to route audio material between Cubasis and other compatible apps in realtime.

Using Audiobus, you can

  • record / input audio from other apps.
  • output audio from Cubasis into other apps.
  • use additional effects processing apps when routing sound between Cubasis and other apps.

Having launched the Audiobus app, tap either the input or output port and choose Cubasis. You can add multiple apps to the input port. Initially, if the app isn't already running, the port is on standby. Tap the port again to launch the app.

  • Using Cubasis as INPUT allows other apps to record Cubasis' stereo audio output.
  • Set Cubasis as OUTPUT and other Audiobus apps can be selected as audio input source in the Cubasis track inspector. Audiobus tracks are always stereo. In the second field you can select an input app of the ones available.

When Audiobus is active, it provides an overlay interface for easy inter-app control. When Cubasis is in the background, it offers the following means of remote control:

  • accessoriesSwitch to Cubasis
  • accessoriesRewind: Returns the playhead to the beginning of bar 1
  • accessoriesPlay / Pause: Also stops recording
  • accessoriesRecord: Starts playback and recording; pressing it again only stops recording but continues playback

Follow these steps to record audio from another app into Cubasis:

  • Launch the Audiobus app
  • Select one or more input apps (optionally an effects app) and launch them
  • Set Cubasis as the output app and tap to run it
  • Each Audiobus app has automatically created a corresponding track in Cubasis.
  • If you haven't loaded any music yet, turn on the metronome or load a few drum loops in order to stay in sync with your project while recording.
  • Switch to one of the input apps.
  • In the Audiobus overlay interface, tap the Cubasis icon, then tap the record button to start recording.
  • Press the play button to stop recording and playback.
  • Switching back to Cubasis, you can take a look at your recording, adjust the playhead position and modify your song before continuing recording.

Follow these steps to record a Cubasis MIDI track played by another app:

  • Launch Audiobus, add a CoreMIDI compatible app as an input and Cubasis as the output app.
  • Configure the other app to receive MIDI from Cubasis.
  • In Cubasis, tap the MIDI track's instrument icon and select No Instrument.
  • In the Inspector's MIDI Connections, set the other app as the MIDI output port.
  • Each Audiobus app has automatically created a corresponding track in Cubsasis.
  • Select the audio track to set it record-enabled.
  • Make sure that the audio track's input is set to Audiobus and the other app's name.
  • Tap the Record button. Cubasis sends the MIDI track's notes to the other app (via CoreMIDI) and records its audio output into the audio track (via Audiobus).
  • Note: MIDI from an external keyboard is received by every CoreMIDI compatible app running in the background simultaneously. Cubasis doesn't manage the routing by forwarding the MIDI input of a track to the MIDI output. It is necessary to configure the MIDI input and output settings in every app depending on the desired routing.
Note: Monitoring is obsolete on Audiobus tracks and therefore not available, as the incoming signals are audible as well as measured in the mixer's input levels by default anyway.

For more information on the Audiobus product, please visit

MIDI via WiFi guide

Follow these steps to establish a WiFi MIDI connection with your computer:
  • If your computer runs Windows, download and install rtpMIDI.
  • Create a new local WiFi network (how to: Mac, PC) and connect your iPad to it.
  • In Cubasis, choose a track, open the inspector and set "Network Session" for the ports.
  • On the Mac, launch Audio MIDI Setup via Spotlight and create a network session. Select your device and hit Connect. On Windows, use rtpMIDI.
  • Run Cubase or any other desktop DAW and set up its MIDI properties to respond to MIDI input from your WiFi network session. Now you can trigger notes in your desktop DAW using your iPad.