Lexicon PCM96 — обзор эффектов реверберации: зал, пластина и двойная задержка [41/68]

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RANdoM hALL (SteReo ANd MoNo)

Random Hall is a hall effect with gradual build-up, well suited to complex

sounds like orchestral music. Its reverberators change over time in controlled

random ways to avoid the buildup of tinny, grainy, metallic, or other color-

ations. The modulation can be noticeable and is often a desirable effect.

The early reflections are user adjustable in amplitude and delay. Some skill

is needed to set useful reflection patterns. The pattern can be expanded or

contracted in time using the “Delay Master” control, and the overall level of

the pattern can be set with the “Early Level” control.

A hall is the principal venue for classical ensembles, but has proven to be

useful for all types of music. A hall is comparatively large, with wall-to-wall

distances that are typically several tens of meters. Smaller halls may be used

for smaller ensembles. The characteristic sound of a hall includes very low

initial reflection density, with little reflection energy before 60-100 mil-

liseconds. Density buildup is more gradual, because of the larger distances

between reflecting surfaces. Reverberation time is somewhat longer as well.

Finally, in most halls lower frequencies reverberate longer than higher fre-

quencies.

One of its charms is a bit of irregularity in the decay. In some cases (very

small rooms with precisely-pitched instruments), this modulation may not

be the best choice. But in general, this is a time-tested reverberator.

PLAte (SteReo ANd MoNo)

The Plate programs mimic the sounds of metal plates, with high initial dif-

fusion and a relatively bright, colored sound. For this reason, they are good

choices for percussion. They are designed to be heard as part of the music,

mellowing and thickening the initial sound itself. The Plate sound is what

many people associate with the word reverb, and it is useful for all popular

music.

dUAL deLAy (SteReo ANd MoNo)

Dual Delay feature two delay lines for each input channel. Each delay line

has a single output or “voice.” Each voice has independent delay time (up to

2 seconds), output level, feedback control, filtering, and panning.

The feedback path includes highpass and lowpass filters. In addition to this

basic voice architecture, Dual Delays feature parameters that provide expand-

ed diffusion controls.