A. (See this entry for GarageBand version 10) It's a very simple 2 step process for the older versions of GarageBand:
Step 1: Turn the Orange Region into a Purple Region so that it can respond to GB's controls...
Step 2: Once the region within the track is purple, and selected, make sure the "Follow Tempo & Pitch" checkbox is selected in the track editor pane if you're using GB3 (and later). The region will then respond to the changes you make with GarageBand's controls.
NOTE: Do not expect spectacular results if you change the tempo or pitch more than a little bit. In general you're likely to get better results using an Audio Editor, though extreme changes carry the same caveat.
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GarageBand from Apple Computer uses audio loops and MIDI loops in Apple Loops format. It can work with Audio Units plug-ins. Apple Macintosh Compatible FireWire and USB interfaces can be used to connect Audio and MIDI instruments to your Mac, and be recorded into GarageBand.
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