Apple Logic Pro 8 - Manual (Page 557)

Chapter 25 Mixing 557
 Size: Determines the size of the plane or sphere (expressed as the radius of the
circular plane).
 Doppler button: Click to enable or disable the Doppler effect. The Doppler effect—
put very simply—is a change in the pitch of a signal perceived by a person who is
moving, relative to the source of the signal.
Using the Extended Parameters
 Global: Diffuse-Field: Turn this parameter on (default) to ensure a neutral sound for
headphone playback, utilizing diffuse-field compensation. When using multiple
Binaural Panners (on several channels), you should turn this option off, and route the
output of the Binaural Panners to an aux channel—in which you should insert the
Binaural Post-Processing plug-in. The Binaural Post Processing plug-in allows you to
apply diffuse-field compensation to all Binaural Panner outputs at once, saving CPU
power.
 The other three parameters are only available in Planar mode. You can use these to
control the vertical offset and tilt of the circular plane—watch the 3D image when
changing them to get a clear idea of their functions.