Apple Soundtrack Pro 3 - Manual (Page 344)

• Collapse: Typically, panners are either of a collapsing style (panning folds input signals
into output speakers) or an attenuating style (panning simply turns down the gain of
speakers further from the pan location). The Collapse slider goes from a fully attenuating
style, through a hybrid style, to a fully collapsing style. At full attenuate (0% on the
slider), no input bleeds to any other output; each channel remains at its original speaker
position. The only change is to output gain. At full collapse (100% on the slider), no
input gain is changed—instead, inputs have their output divided over adjacent channels.
At 50%, a given input channel panned away has its input attenuated by 50% and
distributed between the two adjacent channels.
Collapse at 0 Collapse at 95 Collapse at 50
• Center Bias: Use this slider to determine how the center channel interacts with the left
and right channels. At 0%, all sound that would have gone to the center speaker is
equally distributed to the left and right speaker. At 100%, the center is used fully, just
like any other speaker. This means that if you move the puck directly in front of the
center speaker, all sound emanates exclusively from that speaker. If you move the puck
halfway between the center channel and an adjacent channel (yet still on the perimeter
of the black circle), the sound is equally and exclusively divided between those two
speakers.
• LFE Balance: Use this slider to balance control between LFE and the other five channels.
At -100, nothing is output from the LFE speaker, even if there was LFE input, and all
other channels pass through at unity gain. At its midpoint (0), all six channels pass
through at unity gain to their respective speakers, meaning that LFE input passes
directly to LFE output. At +100, all six signals get summed to the LFE speaker.
344 Chapter 13 Mixing Surround Sound