User Guide

Chapter 21 ES2 287
The term Sample & Hold (abbreviation—S & H) refers to the procedure of taking
samples from a noise signal at regular intervals. The voltage values of these samples are
then held until the next sample is taken. When converting analog audio signals into
digital signals, a similar procedure takes place: Samples of the voltage of the analog
audio signal are taken at the rate of the sampling frequency.
∏ Tip: A random modulation of Pitch123 leads to the effect commonly referred to as a
random pitch pattern generator or sample and hold. Check out very high notes, at very
high rates and high intensities—you’ll recognize this well-known effect from hundreds
of science fiction movies!
Rate (LFO 2)
The LFO2 Rate (frequency) control allows for the free (in the upper half of the slider
range) or project-tempo synchronized (in the lower half of the slider range) running of
LFO 2. The rate is displayed in Hertz or rhythmic values, dependent on whether the
project tempo synchronization is engaged or not. Rates range from speeds of 1/64-
notes through to a periodic duration of 32 bars. Triolic and punctuated values are also
possible. LFO 2 is ideally suited for rhythmic effects which retain perfect synchronicity,
even during tempo changes to the project.
The Envelopes (ENV 1 to ENV 3)
In addition to the complex vector envelope, described in “The Vector Envelope” on
page 293, the ES2 also features three envelope generators per voice. On both the front
panel and as a source in the Router, they are abbreviated as ENV 1, ENV 2, and ENV 3,
respectively.
Note: The roots of the term envelope generator and its basic functionality are
described in “Envelopes” on page 626.
The feature sets of ENV 2 and ENV3 are identical. ENV 3 defines the changes in level
over time for each note played. You can regard ENV 3 as being hard-wired to the
Router’s AMP modulation target.
The parameters of ENV 2 and ENV 3 are identical—but ENV 3 is always used for control
over level.