Viking Synth is an Audio Unit Extension Instrument that works as a plug-in inside host apps. Your plug-ins will been scanned when Garageband launches and can now be accessed through Garageband. Remember to click on 'Plug-ins' to unfold the Audio FX column. 3) Click on the 'Track' icon on the smart control top bar, then drag down the scroll bar to find Audio FX slots. Navigate to Preference> Audio/MIDI and check the Enable Audio Units is ticked. 1) Launch Garageband, create an audio track. Apple is now bringing full support for Audio Unit plugins with iOS9 devices that can be used with production Apps like GarageBand. Audio Units arrived as a replacement for Inter-App Audio, which is still supported by iOS but will be going away at some point in the future.
