Lexicon PCM 80 - V1.1 REV 0 PITCH FX User Manual page 11

PCM 80 Pitch FX User Guide
The Quad>Hall
Algorithm
2-2
The PCM 80 Pitch FX Card contains 6 Pitch Shift algorithms: Quad>Hall, Dual-
Chmb, Dual-Plt, Dual-Inv, Stereo-Chmb and VSO-Chmb. Each of these
offers a unique type of pitch shifting, combined with an uncompromised Lexicon
reverb.
The following pages contain diagrams for each algorithm, along with a complete
parameter matrix. Descriptions of all of the pitch parameters follow the algorithm
drawings. The control and submixer parameters which allow configuration and
routing of the effect blocks are described in the next chapter. Refer to the PCM
80 User Guide for detailed descriptions of all other effect parameters.
The Quad>Hall algorithm, is a 4-voice pitch shifter in series with the PCM 80
Concert Hall reverb. As in the PCM 80 multi-voice algorithms, each voice has its
own delay, level, feedback, cross-feedback and panning controls. The maxi-
mum delay time for each voice is 1.250 seconds.
In this algorithm, the reverb effect is fixed in position following the pitch shifters,
with a final Mix control allowing control over the amount of reverb in the
processed sound. Quad>Hall is designed for creating pitch effects, and is an
obvious choice for creating sequences of notes or chords, melody fragments, or
small amounts of pitch shift for doubling (or quintupling) effects.
Lexicon
Concert Hall