I am trying to edit a clip in GarageBand which only results in a 2 second clip. However, GarageBand insists on appending an extra 4 seconds of "dead air" when I export. The full length clip isn't even 6 seconds.
What gives?
Turn on the Cycle Region button () and stretch the yellow bar to exactly encompass the length you wish exported. That should export that specific length without the added silence.
There's a purple triangle in the ruler in the top of the Garageband window. Dragging that will set the length of the project, and probably also the length of the file GB outputs.