Lexicon 300 - V3.0 REV Owner's Manual page 75

BAL implements a sine/cosine balance adjustment. Balance is smoothly ad-
justed over a wide range, with excellent resolution in the critical area around
zero. The display indicates the actual channel gains as the control is varied.
ROT is similar to BAL, but it treats stereo information somewhat differently. Any
signal panned to the center (mono) will be treated by ROT exactly as it would be
treated by BAL. However, if a signal is panned full right and the control is moved
toward the right, instead of simply being attenuated (as BAL would do) the right
channel is inverted in phase and added to the left channel. A stereo image
appears to rotate when this control is used. Ambient information is preserved,
and both channels appear to retain equal loudness.
If stereo material is recorded with a coincident pair of figure-of-eight micro-
phones, moving the ROT slider is exactly equivalent to rotating the microphone
pair. Other microphone arrays and multimicrophone setups do not rotate
perfectly, but using this control is frequently preferable to simply adjusting
balance. The display shows the actual channel gains for a continually panned
source.
DLAY controls a 5-second stereo delay line, with a resolution of 10 milliseconds.
Separate mono and fine controls are on the Delay page below. This is a post-
processing full-level delay, and is always in the circuit.
When D-Em is On, the incoming signal is digitally de-emphasized. This should
not be used unless the material has been emphasized in the record process—
such as a PCM-F1 tape. Note that the emphasis bit in the incoming signal can
be turned off from the 300 front panel. See Chapter 2: System Operation: Setup
Edit.
When digital de-emphasis is applied, the CD mastering lab must be informed
that the tape is not emphasized, and the CD emphasis bit should be manually
set to Off. Mastering labs are happy to do this, but they must be informed!
When this control is on, the left channel is delayed relative to the right by 11 sec
(1/2 sample). This control specifically corrects for the timing error between
channels caused by consumer digital systems (e.g. the Sony PCM-F1 and its
progeny) that time-share single analog converters. Turning on this delay time
aligns the left channel audio data for compatibility with professional systems.
RFnS is used for digitally correcting probelms you used to be able to fix (or
create) by switching analog cables around. The normal setting is +L to the left
output and +R to the right output. Other settings should only be used when
correcting some problem created previously in the recording process.
+L+R = Normal Routing
+L-R = Right Channel polarity inverted (flipped)
+R+L = Left and Right Channels swapped
-R+L = Right flipped and swapped with Left
The Algorithms and their Parameters
BAL (Balance)
ROT (Rotate)
DLAY
D-EM
(De-emphasis On/Off)
11 sec (1/2 sample)
RFnS (Right Channel
Flip 'n' Swap)
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