Auxiliary Envelope; Low Frequency Oscillators (Lfos) - E-Mu Xtreme Lead-1 Manual

See the Programming
Basics section of this manual for
detailed information about how
the Envelopes work.
The default PatchCord
settings connect the Filter
Envelope to Filter Frequency but
the envelope can be routed to
any real-time control destination
using a PatchCord.

Auxiliary Envelope

Low Frequency
Oscillators (LFOs)
Defining the Filter Envelope
The Filter Envelope controls the filter frequency of the layer over time. The
Envelope has six stages to the contour: Attack 1, Attack 2, Decay 1, Decay 2,
Release 1 and Release 2. When a key is pressed, the Envelope goes through
the first four stages. If the key continues to be held, the envelope holds at
the Decay 2 level. When the key is released, the envelope immediately
jumps to the Release 1 stage, then the Release 2 stage finally ending at the
Release 2 level.
+100
0
time
-100
Key Down
The Auxiliary Envelope is a supplementary general purpose envelope that
can be routed to any real-time control destination in the PatchCords. It is
identical to the filter envelope generator. See "Filter Envelope" on page 143
for full details.
A Low Frequency Oscillator or LFO, is simply a wave that repeats at a slow
speed. Xtreme Lead has two LFOs per layer identified on the display as
LFO1 and LFO2.
An LFO can be routed to any real-time control destination using a
PatchCord. LFOs have a myriad of uses, some of which probably haven't
been thought of yet. The following examples show a few common uses.
• Control the pitch of the sound (LFO -> Pitch). This effect is called
"vibrato" and is an important performance tool. Many presets use this
routing with the modulation wheel controlling "how much" modula-
tion is applied.
• Create a "tremolo" effect by routing the LFO to control the volume
(LFO -> AmpVolume).
• Add a bit of animation to the sound by routing the LFO to control the
filter. Set the PatchCord amount low for a subtle effect.
The LFOs have five parameters: Shape, Sync, Rate, Delay and Variation.
Auxiliary Envelope
Sustain
Key Released
Xtreme Lead-1 Operation Manual 145
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