Lexicon LXP-15-II Owner's Manual page 34

LXP-15 II Owner's Manual
Lexicon
Gate parameters Predelay: A predelay providing up to 262ms of delay. It is located after Treble
and Diffusion and before the gated reverb . Relatively short predelay times
(60ms or less) will add depth to gate effects that use a mix of wet and dry signal.
Longer predelay times will produce a noticeable slap, or echo, between the wet
and dry signals.
When creating patches, Predelay is controlled from two patch page parameters.
Pdlyhi provides coarse control over the entire delay range for the parameter (0-
262ms). Pdly provides fine control over a smaller range (3.96ms).
Predelay Feedback: A feedback loop around Treble, Diffusion, and Predelay.
When set to maximum ( 99%), it continues to add input signal to the feedback
loop. Feedback can be positive or negative. Note that since Treble and Diffusion
are within the feedback loop, their effects on the overall sound will be enhanced
as feedback is increased.
Slope: Determines how the amplitude builds over time (Size). Low Slope
settings result in a higher amplitude at the beginning of the gated reverb; high
Slope settings result in a higher amplitude at the end of the gate.
Treble: Adjusts high-frequency roll-off. Setting Treble to "Full" gives a flat
response. As noted above, Treble is within the Predelay feedback loop. If Treble
is set to some value other than Full, then the roll-off slope at the selected
frequency will increase with each pass through the feedback loop. For example,
if Predelay and Predelay Feedback are set to produce echoes (200ms and 75%)
and Treble is set to 1.92kHz, the echoes will become progressively darker.
Size: Sets the rate of buildup of diffusion after the initial period (which is set by
Diffusion). It also acts as a master control for Slope. Because of this link, Size
changes a gated reverb sound from very large to very small. Generally, you
should set Size before adjusting anything else. The size in meters is roughly
equivalent to the longest dimension of the space you are trying to create. Note
that changing Size temporarily mutes the outputs.
Diffusion: Controls the degree to which initial echo density increases over time.
High settings of Diffusion result in high initial buildup of echo density; low settings
cause low initial buildup. Echo density is affected by Size — smaller spaces will
sound denser. To enhance percussion, use high settings of Diffusion. Like
Treble, Diffusion is also inside the Predelay feedback loop. When feedback and
diffusion are used together, the amount of diffusion will increase with each
repetition of the loop.
LFO Rate: Adjusts the rate of the internal LFO. Note that in order to hear the
effect of changing the LFO Rate, the LFO must first be patched to control some
parameter in the algorithm.
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