Moog MP-201 User Manual download pdf (Page 34)

MP-201 User’s Manual

Page 36

MP-201 User’s Manual

Page 37

LFO OFFSET

The LFO OFFSET parameter sets the initial offset of the LFO when a Preset is

called up. If the footpedal is programmed to control the Offset (FPEDAL MODE =

OFFSET), then the initial LFO Offset value will be overridden as soon as the pedal is

moved. When FPEDAL MODE = OFFSET, the actual offset range is specied by the

programmed HEEL and TOE values for the selected Channel.

To understand LFO Offset, it’s helpful to think of it as adding an expression pedal

voltage to your LFO signal; in effect, the LFO signal ‘oats’ on the Offset voltage.

It’s also important to understand that large LFO Offset values can contribute to signal

clipping at the CV output, particularly when the LFO Amount is set very high (don’t

worry - you can’t damage the MP-201). The reason for this is that the output of the

MP-201 cannot exceed 0 – 5V in Unipolar mode, or ±5V in Bipolar mode, and it’s

possible to program the LFO parameters in such a way as to run into these limits. To

illustrate, let’s consider an example using an LFO Triangle wave set to the maximum

Amount while we apply various Offset values (Bipolar mode shown).

LFO OFFSET = 2048 (0V). The full-scale

LFO signal (10V) oats on the Offset value,

centered at zero volts.

LFO OFFSET = 3072 (+2.5V). The LFO signal

oats on the positive Offset value. The Offset

causes the peak of the LFO to exceed the

+5V limit, resulting in clipping.

LFO OFFSET = 1024 (-2.5V). The LFO signal

oats on the negative Offset value. The Offset

causes the trough of the LFO to exceed the

-5V limit, resulting in clipping.

LFO OFFSET = 0 (-5V). The large negative

Offset causes the trough of the LFO to be

severely clipped.

To avoid clipping, you can either reduce the LFO Amount value, the LFO Offset

value, or both.

PERFORMANCE TIP: Clipping can also be used to create variations

of the Multi-pedal waveforms, such as at-topped sawtooth and ramp

waves.

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Moog MP-201 User Manual Page 34