Lexicon PCM NATIVE - Hall Algorithm; Hall Algorithm Description

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Hall
The highly acclaimed Lexicon
®
Hall, Concert Hall, and Random Hall reverb algo-
rithms have regularly been used by live sound and recording engineers because
of their exceptional ability to reproduce the musical ambience of large, wide,
panoramically wonderful spaces.
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 reection
density, with little reection energy before 60-100 milliseconds. Density buildup is
more gradual, because of the larger distances between reecting surfaces. Re-
verberation time is somewhat longer as well. Finally, in most halls lower frequen-
cies reverberate longer than higher frequencies.
This new hall algorithm shares these basic characteristics with Random Hall and
Concert Hall, but is smoother with a more even decay. Its initial density is also
lower than Random Hall so it may be a better choice when the reverberation
needs to be unobtrusive.