3-33
Algorithms and Parameters
PCM 81
Pst Mix
In the 4-Voice Algorithms, this parameter controls the mix of the
reverb audio with the post delayed reverb audio (0-100%).
Pst Dly L&R
In the 4-Voice Algorithms, these parameters control the time of the
post delay. The available range of 0-682ms can produce a variety
of pitch shift, flange, or stutter effects on the reverb audio.
(Expanding PCM 81 memory will extend this range to 1365ms.)
GldResp
In the 4-Voice Algorithms, this parameter controls the response of
the glide of the post delay. The range is 0-100, with a typical
default setting of 50. This setting provides a good, real-time glide.
Changing a delay time from 0 to 100 ms with a glide response of
0, causes the glide delays to take a minute or more, allowing
subtle changes in delay times and echoes with no noticeable pitch
shifting. A glide response of 100 is ultrafast, causing high speed
pitch shift, and even chirping effects with large delay time changes.
GldRange
In the 4-Voice Algorithms, this parameter controls the range over
which changes to the post delay time will be performed as a glide.
For example, if GldRange is set to 100ms, and the PstDly L and R
times are varied over a range of 100ms, those delays will glide
smoothly from one delay time to another. Suddenly changing the
delay time to a greater value, such as 200ms, will cause the audio
delay to change instantly to the new time without gliding. The
available range is 0-682ms, with 0 causing all delay time changes
to be "instantaneous", and 682 causing all delay time changes to
glide.
THE PITCH ALGORITHMS
ABOUT THE PITCH ALGORITHMS
The PCM 81 contains 7 Pitch algorithms, each combined with
uncompromised Lexicon reverb to provide a wide range of useful
pitch shift effects, ranging from pitch correction to special effects.
A Quad>Hall algorithm provides a 4-voice pitch shifter, combined
with the PCM 81 Concert Hall reverb. The Dual-Chmb, Dual-Plt,
Dual-Inv, Stereo-Chmb and VSO-Chmb algorithms use the PCM 81
Dual FX structure for unparalleled flexibility and ease of use. The
Pitch Correct algorithm provides tools specifically designed for
correction of previously recorded vocal tracks.
The five Dual FX-type algorithms: Dual-Chmb, Dual-Plt, Dual-Inv,
Stereo-Chmb and VSO-Chmb, each contain two independent
effect blocks: one of three stereo reverbs and one of three different
stereo pitch shift blocks. Each algorithm also has the full set of
modulation and patch features of the 4 and 6-Voice and algorithms.
. . . continued on page 3-34
You can set and display delay values in units of time, or with tempo
values. Press Up and Tempo simultaneously to toggle between these
two options. When time units are selected, delay times are set and
displayed in milliseconds (From 0ms to the maximum available delay
for that parameter). When tempo values are selected, delay values
are set and displayed as a ratio of echoes to beats (from 24:1 to
1:24). This will automatically synchronize the delay to the current
tempo (MIDI, Internal, or TAP — see Tempo Mode in Chapter 2.) For
example, a delay setting of 1:2 (1 echo for every 2 beats) will
produce half-note delay rhythms synchronized to the current tempo.
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