Lfos - Access VIRUS CLASSIC User Manual

LFOs

LFO ENV MODE
In addition to their standard function as low frequency oscillators, LFO 1 and 2 can also serve as
additional, albeit simple, envelopes. When you activate ENV mode, the selected LFO waveform will
cycle through just once when you play a note. This lets you use a sawtooth wave to create a ramp,
the shape of which you can vary from linear to exponential by means of LFO Curve in the LFO EDIT
menu. The polarity of the respective AMOUNTs determines if you end up with an ascending or a
descending ramp. If, on the other hand, you choose a triangle for your waveform, you will end up
with an ascending phase (attack) and a descending phase (decay). The LFO Curve parameter also
lets you determine the relative rates of the attack and decay phases. The absolute rate of the enve-
lope is determined with the LFO RATE knob.
LFO MODE
You can set the LFO Mode parameter so that the LFOs are polyphonic or monophonic. In Poly
mode, the LFOs of several voices have different phase positions. This lets you create complex mod-
ulations for pad-like sounds, and puts an end to the sonic monotony of a "wobbly" monophonic
LFO. In SINGLE mode, one LFO controls several voices so that the modulation will affect several
voices in the same way. This which will make the effect stand out in the mix.
LFO TRIG PHASE
When this function is activate, the given LFO will no longer oscillate freely; instead, it restarts its
wave cycle at the beginning of each note.
Next to the obligatory OFF position, this parameter has 127 further increments. These let you chose
different positions within the wave cycle at which the LFO will start oscillating at the start of each
note.
In contrast to ENV mode (which is available independently of KEY TRIG PHASE), an LFO with KEY
TRIG PHASE will continue to oscillate once it has been triggered. In other words, in behaves like a
"real" LFO rather than an envelope.
This triggering option will also work when the LFO is synced up to the master clock. This means
that synced LFOs can be triggered via note-on messages. The LFO rate, however, is still determined
via the master clock and/or MIDI clock.
VIRUS CLASSIC MANUAL 165
Tips And Tricks