Creating an IAC Bus

To allow your DAW application to send MIDI to your stand-alone Power PC-based host application to trigger Atmosphere and Trilogy, you need to create an IAC Bus. An IAC Bus is a virtual MIDI bus that allows MIDI communication between applications. In order to create it, follow these steps:

1. Open your Audio MIDI Setup, located in
   
   Macintosh HD/Applications/Utilities/Audio MIDI Setup
    
2. Select the “MIDI Devices” tab, and double click on the IAC Driver icon.
    
3. Make sure the “Device is online” button is activated.
    
4. Click on the “Ports” tab, and under the ports list, click “Add Port”.
    
5. Double click on the name of the bus you just created, and rename it “Spectrasonics”.
    
6. Click “Apply” and close the IAC Driver Properties window.
    
7. The “Spectrasonics” IAC bus you created will be available in both the DAW application and the stand-alone host application to allow MIDI communication between them.  Depending on the DAW application you use, make sure to avoid MIDI feedback loops when using the IAC Bus.

Note for Digital Performer users: Digital Performer uses its own Interapplication MIDI bus, so there is no need to create an IAC Bus.  For more information, click here.

Go back to The Stand-alone Host “Rack” page.