Want to use Jam Pack 4 loops in Soundtrack 1.x? Then know this. Jam Pack 4 installs loops in a location that Soundtrack 1.x doesn't immediately know about. To use Jam Pack 4 loops, you will need to manually index the loops. Click
here for information on how to index the loops.
The Jam Pack 4 loops are installed in the following directory:
/Library/Audio/Apple Loops/Apple/Jam Pack 4 - Symphony Orchestra/