Shelf; Size (Reverb Size); Spread; Spin (And Wander) - Lexicon PCM NATIVE Owner's Manual

Reverb bundle

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Shelf

This parameter effects all filter types. The shelf specifies the audio level below

which the filter has no effect. For example, let's imagine we're using a one-pole

lowpass with shelf set at -12 dB. The lowpass filter affects only the strongest 12

dB of the signal. Below the shelf, the signal is unfiltered. This is easy to under-

stand by viewing the EQ window.

Size corresponds roughly to the length of the longest wall of a rectangular room.

In a more general sense, it corresponds to the overall dimension of some mythi-

cal space. This space has a geometry that causes sound to bounce around.

When the room size is small, the "walls" of this space are closer together and the

resultant reflection density increases. When the room size is large, that density

decreases. The most natural reverbs use room sizes that vary from about 24

meters to 45 meters or so, but there are many useful reverbs that are outside of

this range.

There is a relationship between this parameter and the Reverb Time parameter.

Please see the Reverb Time parameter for clarification.

See Shape

These two parameter control randomization effects within the reverb. Random-

ization is used to control the spectral purity of the reverb. It can also—at some

settings—create a more noticeable modulation effect. Artificial reverbs some-

times create audible artifacts with some types of signals. For example, a voi-

ceover in a very small room might sound a little metallic. Randomization works

to minimize these effects and remove the sense of ringiness.

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