Apple GarageBand '09 - Manual (Page 97)

Chapter 9 Tutorial 7: Mixing and Adding Effects 97
3 Choose an effect from one of the empty effect slots.
Additional effects include treble reduction, bass reduction, chorus, flanger, phase
shifter, and tremolo. The available effects are listed in the effect pop-up menu,
including any third-party Audio Units effects that are installed on your computer.
Turning Effects On and Off
You can turn individual effects on or off (turning an effect off temporarily is called
bypassing the effect). Turning effects on and off has several advantages: you can hear
how each effect changes the sound of your music, and you can see which effects have
the greatest impact on your computer’s performance.
When you turn off an effect, the effect’s current settings are retained, so any
adjustments you have made are not lost.
To turn on an effect:
m In the Track Info pane, click the on/off button (with a rectangle in the center) to the left
of the effect name. The rectangle lights to show that the effect is active. Click the on/off
button again to turn the effect off.
Use these controls to
add and adjust effects.