User Guide
20.2. SIMPLER 290
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 inuence of envelopes on pitch and lter cutoff can be decided using the envelope
amount controls in each of these sections.
20.2.5 Filter
The Filter section offers classic 12 dB or 24 dB low-pass, band-pass and high-pass 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 the points in
the spectrum where frequencies are excluded by ltering.
The best way to understand the effects of these controls is 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.
20.2.6 LFO
The LFO (low-frequency oscillator) section offers square, sine, triangle, sawtooth up, saw-
tooth down and random waveforms. The main control in this section is the Rate control,
which changes the LFO frequency within a range of 0.05 to 30 Hz. LFOs are applied individ-
ually to each voice, or played note, in Simpler. Square, triangle and sawtooth LFOs restart
each time a new voice is played, while sine and random do not. The Key parameter changes
the denition of each LFO's Rate as a function of the pitch of incoming notes. A high Key