Lexicon 960L LvLL, LvRR, LvLR, LvRL LvLFLF, LvLFLS, LvLFRF, LvLFRS LvLSLF, LvLSLS, Mix, RefDly

Using The Reverb Program Lexicon, Inc.

Parameters Used in the 960L Algorithms, Continued

LvL>L,	Reflection Levels. In many real spaces, distinct reflections and echoes are an important part
LvR>R,	of the sound, so many of the 960L's reverbs have reflection delay and echo paths with
LvL>R,	appropriate controls.
LvR>L,
LvLF>LF,	The Reflection Delays set the delay time. For example, dLF>RS is the delay time in a path from
LvLF>LS,	the Left Front Input, through the diffusor, through a delay of dLF>RS duration, and finally to the
LvLF>RF,	Right Surround Output.
LvLF>RS,
LvLS>LF,	Each of these delay paths has its own level control as well as a master control for all of the
LvLS>LS,	(ErlLvl). The level of the example delay path is set by the related control LvLF>RS.
LvLS>RF,
LvLS>RS,
LvRF>LF,
LvRF>LS,
LvRF>RF,
LvRF>RS,
LvRS>LF,
LvRS>LS,
LvRS>RF,
LvRS>RS
MidRT	Midrange Reverberation Time. The basic control for setting the duration in seconds of the
	reverberant tail. This is the control that is most like the physical RT60 parameter. The perceived
	time will also be affected by RtHicut and Bass. Generally, MidRT should be set to a value of
	about 1.2 seconds for small rooms and up to 2.4 seconds or so for halls.
Mix	Wet/Dry Mix. Each of Lexicon's factory programs are typically shipped at 100% Wet, and we
	recommend controlling the mix at the console, rather than on the LARC2. Where a console is not
	available this control can be used to adjust the wet/dry ratio. When a console is being used to
	adjust the mix of the reverberation returns, be sure the wet/dry Mix control is set at 100%.
	Otherwise the direct path through the 960L will interfere with the direct path through the console
	and severe combing will occur.
RefDly	Reflection Delay (Reverse algorithm only) operates very much like the reflection delays in other
	reverbs. In Reverse, it has a particular role, which is to supply the "dry" sound at the end of the
	apparently reversed tape. The Reflection Delay is connected to Size. Changes in Size will scale
	this delay. See also Reflection Level.
RefLvl	Reflection Level (Reverse algorithm only) operates very much like the levels for reflection delays
	in other reverbs. In Reverse, it has a particular role, which is to supply the "dry" sound at the end
	of the apparently reversed tape. See also Reflection Delay.
Rolloff	Rolloff (Stereo algorithms only) sets the cutoff frequency of a 6dB per octave low-pass filter at the
	output of all reverberation processing. Rolling off high frequencies with this filter can result in more
	natural-sounding characteristic. For a shelving characteristic, use Shelf. Rolloff does not affect the
	frequency response of the early reflections. See RefHicut.
RPreD	Rear PreDelay (Surround algorithms only) is an additional predelay that can be added to rear
	input path to recreate the effect of the space’s rear wall being farther from the listener than the
	front. The total rear-channel predelay is the sum of RvbPreD and RPreD, so the latter’s values are
	always preceded by a "+" on the display. E.g., with RPred of +20 and RvbPreD of 100, the onset
	of reverberation from the rear will occur 120 msec after the initial acoustical event. For best results
	we recommend that the RPreD control be set to values less than 20ms. Greater values tend to
	make the reverberation from the rear separately audible from the front reverberation, and the room
	seems less natural.

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