Try this – Moog Music SUB PHATTY User Manual

Page 21

MODULATION CONTROLS CONT.

PITCH AMT OSC 2 ONLY: Pressing this button applies pitch modulation to oscillator 2 only, with no
effect on oscillator 1. The button illuminates when it’s engaged.

If you engage the

HARD SYNC OSC 2 button (which phase-locks the oscillators), then modulating

oscillator 2’s frequency with an LFO or envelope will change the oscillator’s harmonic content but not
its pitch.

FILTER AMT: Use this knob to specify the depth of variation applied to the filter’s cutoff frequency
when the

MOD wheel is engaged. Applying LFO modulation to the filter is useful for generating slow

filter sweeps, wobbles, and repeating effects.

WAVE AMT: Use this knob to specify the depth of variation applied to the waveform of both
audio oscillators when the

MOD wheel is engaged. As the waveform is modulated, the amplitudes,

frequencies, and phase of the harmonics change dynamically. Waveform modulation has no effect on
the sub oscillator, which always generates a square wave.

NOTE: Using Shift mode or the plug-in editor, you can also assign Wave Amount to affect oscillator 1 or 2
independently (see Hidden Parameters on pg. 28).

TRY THIS

LFO WAVEFORMS

It’s likely that much of the time when you’re playing melodic sounds, you’ll use the

MOD wheel

to control note vibrato to make your playing more expressive. To try this, begin by selecting
your favorite lead or solo preset. In the

MODULATION section, turn the SOURCE knob

counterclockwise to its triangle-wave position. Turn

PITCH AMT up to 2 and turn LFO RATE

to 6. Play a note and nudge the

MOD wheel up slightly to produce vibrato. Play a few more

notes, adding vibrato during sustained notes when it feels appropriate. Adjust the

LFO RATE

to taste.

Learn your way around the LFO by trying the other waveforms and destinations, and by
varying the

LFO RATE and depth. Begin by turning up the PITCH AMT knob slightly, raising

the

MOD wheel, and then switching the SOURCE knob to the square wave setting. Square

wave LFO modulation produces a trill that alternates between two pitches. Varying the

LFO

RATE changes the speed of the trill, and varying the PITCH AMT or the MOD wheel depth
changes its interval.

Now vary the

LFO RATE, PITCH AMT, and MOD wheel depth using the SOURCE knob’s

sawtooth, ramp, and sample-and-hold settings. Notice that sawtooth and ramp-wave
modulation work best at slow rates, and sample-and-hold modulation works really well when
it’s applied to modulate the filter with

RESONANCE turned up at least halfway. When you’re

exploring filter modulation, try turning down the oscillator signal and turning up the noise.

PULSE WAVE MODULATION

By routing LFO or envelope modulation to an oscillator’s wave amount, you give the
waveform motion by changing its harmonic content dynamically. As the control signal
changes, so does the waveform. Although the Sub Phatty’s continuously variable oscillators
let you apply modulation to any waveform, it’s most traditional to modulate a pulse wave.

Beginning with an initialized patch, turn up oscillator 1 in the

MIXER section and turn the

WAVE knob halfway between square and pulse. Set the LFO RATE at approximately 3Hz and
the LFO waveform to triangle.