0SC MODE
(from the Pearl Manual)
The wave frequency, variation range, and noise of
the 2 osciIIIators are pre-set.
A: One oscillator sound, at this position the regular
drum synthesizer sweep can be effected.
B. Sound of one oscillator adjusting the other
osciIIator frequency; produces a metallic sound.
C. Sound of a mix of two oscillator outputs; sound
is similar to that of a vibraphone.
D. Sound of mix of two oscillator outputs; produces
a low to high sweep and is done by hitting pad
softly or hard; there is no connection to SWEEP
SPEED and SWEEP RANGE
E. Sound of one oscillator adjusting the other
oscillator frequency with a mix of noise; produces a
sound similar to hitting thin metal.
F. Sound of only noise.
CONTROLS
TUNE:
Sound of 2 oscillator frequencies and filter
cutoff frequency adjusted; this makes tuning
possible.
DECAY:
Adjusts the sustain of individual notes.
WIDTH:
Adjusting of the filter cutoff frequency
range, when the range is wide, the wave frequency
starts from high and gradually becomes low.
SWEEP SECTION
SPEED:
Adjusts the rate of transition from the
original pitch sounded when a drum is struck to a
final pitch determined by the SWEEP section
DEPTH control.
SWEEP FADER:
Controls the final pitch heard of
each note sounded when the SWEEP section
movement switch is UP or DOWN. The DEPTH
control tracks the TUNE control. Setting the fader
to 0 turns off the sweep modulation.
DIRECTION:
Controls direction of pitch movement
both UP and DOWN.
LOW FREQUENCY OSCILILATOR
(LFO) SECTION
LFO SPEED:
Adjusts the speed of the low
frequency oscillator to enable vibrato to be added
to the basic sound selected by the SIGNAL
SOURCE and SWEEP sections
.
LFO FADER:
Controls the amount of pitch
movement, at the speed determined by the LFO
section. Setting the fader to 0 turns off the LFO
modulation.
LFO SHAPE:
This switch determines the wave
shape employed by the LFO section. A square
wave results in abrupt pitch changes and notice-
able pitch at upper and lower extremes. A triangle
wave results in almost continuous movement and
little time spent at the pitch extremes.
S/H (SAMPLE AND HOLD):
This switch adds a
sample and hold output signal to the main output.
S/H speed is set by the LFO section SPEED
control. S/H will operate even if LFO modulation is
OFF. When you switch on S/H, the tune will be
automatically changed with each hit.
INPUTS
DECAY CV:
-10V to 10V. Acts as an offset to the
DECAY slider.
Trigger In:
This triggers the VCA of the device, it is
a DYNAMIC input so it will respond differently to
various level pulses. The sensitivity can be
adjusted with the sense trimmer on the back. The
circuit is unchanged from the original device so
drum triggers can be attached to this input.
PITCH CV:
-10V to 10V, 1V/Oct scaling. Acts as an
offset to the TUNE slider
MODE:
This input changes the OSC mode type
and has two types of operations:
CV Control
where the OSC mode is selected by sending a CV
0-5V and
Gate Advance
where a gate on this input
advances the OSC mode to the next mode
whenever a gate or trigger is received (5V). The
direction of the change in
Gate Advance
mode is
determined by the direction of the last manual OSC
Mode change using the OSC mode buttons. To
switch between these two functions, simply long
press BOTH buttons for 3 seconds.
OUTPUT:
Audio output at Eurorack levels
FILTER CV:
-10V to 10V. Filter cutoff frequency
as an offset to the WIDTH slider
www.MichiganSynthWorks.com
December 2018
