Lexicon 300, Owner'S Manual

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Lexicon
300 V 3.0 Owner's Manual
4-6
Random Hall Tweaks Page
SPIN affects the movement of the reverberation tail. The object of SPIN (and
WAND) is to continuously alter the timbre of the reverberant sound. This makes
the result more natural, without making the position of instruments unstable.
SPIN should typically be 20 or higher. High values may make the pitch of piano
or guitar unstable.
WAND sets the distance in time that the early reflections will move. For best
results WAND should be about 10ms at larger sizes.
SHAP and SPRD work together to control the overall ambience of the reverbera-
tion created by the 300. SHAP determines the contour of the reverberation
envelope. With SHAP all the way down, reverberation builds explosively, and
decays quickly.
As SHAP is advanced, reverberation builds up more slowly and sustains for the
time set by SPRD. With SHAP in the middle, the buildup and sustain of the
reverberation envelope emulates a large concert hall (assuming that SPRD is at
least halfway up, and that SIZE is suitably large—30 meters or larger.)
SPRD works together with SHAP to control the duration of the initial ambience
created by the 300. Low SPRD settings result in a rapid onset of reverberation
at the beginning of the envelope, with little or no sustain. Higher settings spread
out both the buildup and sustain.
DIFF controls the degree to which initial echo density increases over time. High
settings of DIFF result in high initial buildup of echo density, and low settings
cause low initial buildup. Echo density is also affected by SIZE; smaller spaces
will sound denser. To enhance percussion, use high settings of diffusion. For
clearer and more natural vocals, mixes, and piano music, use low or moderate
settings of diffusion.
When LINK is set, the reverb time and spread values scale linearly as the SIZE
control is varied. For some special effects, RTIM and SPRD can be unlinked.
SHLF modifies the low-pass characteristic of the rolloff control, turning it into a
shelving filter. SHLF sets the gain of an output path which is mixed with the output
of ROLL to form the main reverberant output. Both the pre-echoes and the
reverberation are affected. For example, if SHLF is set to -6dB, frequencies
below approximately ROLL/2 will be boosted by 3.5dB; above approximately
ROLL x 2, the response will be flat.
SHLF provides a method for making the spectral content of the reverberation
match the ideal spectrum for musical acoustics in rooms. For this application,
ROLL should be set between 700 and 1.5kHz, with SHLF set between 12 and
-6dB.
SPIN (Randomization)
WAND (Wander)
DIFF (Diffusion)
SHAP (Shape)
SPRD (Spread)
LINK
SHLF