Kurzweil K2661 Musician's Manual page 452

Advanced KDFX
Exploring the Studio Parameters
Stereo Inputs with Pan (SP)
If the input is set to SP, then each FXBus send has a Pan parameter and a Width parameter. The
Width parameter determines how much separation there will be between the left and right input
signals as they are sent to the FXBus: assuming Pan is set to 0%, a Width of 100% means the
signals will be completely separate, while 0% means they will be combined into "dual mono."
Negative numbers flip the channels around, so that -100% means the channels are separate, but
with left and right reversed, while -50% means they are reversed and partially blended.
The Pan control maintains the stereo image, but "tilts" it one direction or the other. At 0% there
is no change to the signal, while at 100% it all goes to the right channel. At 50%, what had been
hard left will now be in the center, and what had been in the center will now be halfway
between center and right. Negative values tilt the signal to the left.
Input channels
L
R
L
R
L
R
Figure 15-3
A Word About Gain
The Pan, Balance, and Width controls all have constant power curves, so that the combined
signal level doesn't change when you move the signals from side to side. However, if you use
several Pans or Balances on a signal to keep the channels isolated throughout the entire signal
chain (for example, if the Input send is panned 100%, and so are the Aux send, the Mix send, and
the Mix output), you can increase the gain of the signal considerably.
Each stage of hard-panning adds 3 dB, so the increase in gain when the signal reaches the final
output can be as high as 12 dB. In this case, you may want to trim the level at various stages to
keep the signals from getting too hot.
15-8
Width ("SP" or "SB")
Width=100%
L
R
Pan ("SP")
(width=100%)
Pan=0%
L
R
Balance ("SB")
Balance=0%
L
R
Width, Pan, and Balance controls
Width=50% Width=0%
Pan=100% Pan=50%
(width=100%)
Balance=100% Balance=50% Balance=-100%
Width=-100%
Pan=-100%