Apple GarageBand 2.0 - Manual (Page 52)

52 Chapter 7 Working with Software Instruments
The output of a Software Instrument is always stereo.
You can also add and adjust effects for a Software Instrument track. For information
about using effects, see “Mixing and Adding Effects” on page 64.
Select an instrument
from this list.
Use these controls to add
and adjust effects.
Choose a new instrument
generator and generator
preset from these pop-up
menus.
Select an instrument
category from this list.