CHAPTER 23. LIVE INSTRUMENT REFERENCE
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vertically to zoom, and drag horizontally to pan different areas of the sample into view.
23.12.4
Envelope
Simpler contains three classic ADSR envelopes, as seen in most synthesizers, for shaping
the dynamic response of the sample. Volume-, lter frequency-, and pitch modulation are
all modi able by toggling their respective buttons in the envelope section.
Attack
controls
the time in milliseconds that it takes for the envelope to reach its peak value after a note is
played.
Decay
controls the amount of time it takes for the envelope to drop down to the
Sustain
level, which is held until the note is released.
Release
time is the amount of time
after the end of the note that it takes for the envelope to drop from the Sustain level back
down to zero.
The in uence of envelopes on pitch and lter cutoff can be decided using the envelope
amount (Env) controls in each of these sections.
23.12.5
Filter
The Filter section offers classic 12 dB or 24 dB lowpass, bandpass and highpass lters, as
well as a notch lter, each of which can impart different sonic characteristics onto the sample
by removing certain frequencies from the waveform. The most important parameters are
the typical synth controls Frequency and Resonance.
Frequency
determines where in the
harmonic spectrum the lter is applied;
Resonance
boosts frequencies near that point.
The best way to understand the effects of these controls is simply to play with them!
The Frequency parameter can be modulated by an LFO, note velocity and an envelope
each of which have an amount control in the Filter section. The Key (tracking) control allows
for shifting the lter's frequency according to note pitch.
23.12.6
LFO
The LFO (low-frequency oscillator) section offers sine, square, triangle, sawtooth down,
sawtooth up and random waveforms. The LFO run freely at frequencies between 0.01 and
