The Drone Commander’s oscillators are tuneable up to
~370 Hz, corresponding to F# above middle C.
Turn OSC 1 (or OSC 2) clockwise to increase the pitch.
Each oscillator offers the choice of square or triangle
waveform. Pull up the OSC 1 (or OSC 2) knob to select
the triangle wave, which has a more mellow tone.
OSC 1 and OSC 2
The MIX knob blends the output of OSC 1 and OSC 2 like
a crossfader. Turn the MIX knob counterclockwise to
hear more of OSC 1.
Pull up on the MIX knob to mute the oscillators. Even
with the oscillators muted, the LFO, Pulse, and Filter
are still audible and can be used for sound effects.
MIX
The main LFO (low-frequency oscillator) adds
movement to the Filter. It creates a sawtooth
waveform that affects the Filter’s center frequency,
sweeping it upward or downward. This motion reveals
the harmonic overtones from OSC 1 and OSC 2.
Turn the LFO knob clockwise for slowest motion.
Pull up the LFO knob to cancel he connection from LFO
to Filter. This produces a more consistent sound level
with less rhythmic information.
LFO
SOUND PARAMETERS
The SHAPE knob controls the influence of the LFO on
the Filter.
With SHAPE turned counterclockwise, the LFO sends a
minimal ‘blip’ to the Filter with each cycle. As SHAPE is
turned clockwise, the sawtooth shape of the LFO
waveform becomes more prominent.
Pull up on the SHAPE knob to reverse the direction of
the LFO.
SHAPE
This rotary switch controls the Drone Commander’s
second low frequency oscillator. It tracks the main LFO
and generates square wave modulations. Its output is
routed to the Filter via the PULSE knob.
2-4-8-16 selects the frequency of the PULSE. A phase-
locked loop is employed to multiply the main LFO’s
frequency by a constant. Selecting “2” for example will
cause the PULSE to seek a frequency twice that of the
main LFO.
2-4-8-16
The PULSE knob controls the depth of square wave
modulation to the Filter.
The LED blinks in time with the Drone Commander’s
pulse.
The PULSE knob is the only knob in the top row that
does not have a push-pull switch.
PULSE
The Drone Commander’s Filter is a bandpass (BPF) type
filter. It modifies the tone of OSC 1 and OSC 2 after
they have been blended with the MIX control.
Pull up on the FILTER knob to access a higher frequency
range.
With the knob in the down-position, the FILTER begins
to self-oscillate as it is turned counterclockwise past
12-o’clock. This can create unexpected volume jumps
and strong bass tones.
FILTER
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