GarageBand: Adding Audio Units - Instruments and Effects::: AU -Audio Units is the plug-in format developed by Apple to coincide with their new audio and MIDI technologies in OS X. Certain programs like Logic support Audio units exclusively, while other programs like Digital Performer 4 support their own MAS format as well as Audio Units. Audio Units are handled at the level of the OS X operating sytem itself and for programmers they can have a certain advantages in that two seperate engines exist for the GUI of the plug-in as well as the sound engine itself, allowing for a more advance user interface design. AU are used by Apple applications such as GarageBand, Soundtrack Pro, Logic Express, Logic Pro, Final Cut Pro, MainStage and most 3rd party audio software developed for Mac OS X such as Ardour, Ableton Live, REAPER, Studio One Professional and Digital Performer, among others. 18 Wheels Of Steel American Long Haul Serial Keygen And Crack.