Lexicon 300, Owner'S Manual

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4-35
The Algorithms and their Parameters
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.
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
Equalization Page
BASL and BASR are 6dB/octave shelving EQ controls with a range of +6 dB
boost and -18dB cut. They move in .50 dB steps from +6 to -6 dB. The crossover
point is adjusted with BXOV.
These controls allow independent adjustment of left and right treble. They may
be used together with the stereo adjustments to create a 12 dB/octave cut or
boost. Note that the 3 dB frequencies can be different from the stereo set.
BXOV sets the crossover point for BASL and BASR. When BASL and BASR are
set to full cut, the level is -3 dB at the frequency set with BXOV.
TXLR sets the crossover point for LTRB and RTRB. When either is set to full
cut, the level is -3 dB at the frequency set with TXLR.
SPEQ sets the amount of a crossfeed between channels. The signal first goes
through a 6 dB/octave low-pass filter whose frequency is set with BXOV. When
SPEQ is set positive (above 0) the crossfeed has a negative sign. When SPEQ
is set negative (below 0), the crossfeed has a positive sign. When the control is
set to either maximum or minimum, the gain in the crossfeed circuit is unity.
The result of this control is to change the separation of low frequency stereo
signals. When the control is raised, low frequencies in the sum (mono) channel
are reduced, and low frequencies in the difference (stereo) channel are raised.
With the control at maximum, low frequency mono signals are completely
removed. This represents an extreme setting which should seldom be needed
RFnS (Right Channel
Flip 'n' Swap)
BASL and BASR
LTRB and RTRB
BXOV (Bass Crossover)
TXLR (Independent
Treble Crossover)
SPEQ (Spatial EQ)