Studio Electronics Boomstar Manual
46
Panels
generator... Come up with some of your own!
OSC 2’s
RANGE
switch functions identically to OSC 1’s
RANGE
switch for
selecting the octave:
LO
(Low frequency––”clicks” below the audible range
for humans...),
32’
,
16’
,
8’
,
4’
,
2’
...)
The
WAVE
switch selects the Sawtooth, Triangle, or fixed Square wave.
The coarse/fine
TUNE
knob sets the pitch, or synced harmonic value when
the
SYNC
switch of Oscillator 1 is in the
ON
position––a very potent tweaking
hot spot!
The
MOD DEPTH
knob sets the depth at which Oscillator 2 is used as a
modulation control, sent either to
ENV 1
(Envelope 1, hard-wired to the filter),
or
ENV 2
(Envelope 2, hard-wired to the Amplifier).
4.2.4 VCF - Voltage Controlled Filter
A
word about the Filter:
The Boomstar’s
four flavor, filter system features, four
classic wide range lowpass filters, and in
the case of the MINI and 2600, “resonant”
filters. The Filter attenuates, or “cuts off”
the higher frequency components––those
which lie above the adjustable cutoff frequency, and passes the lower
frequency components of the audio signal. The (cutoff) frequency control
sets this cutoff frequency; the lower the value of the (cutoff) frequency
control, the less harmonic content the waveform contains after passing
through the filter; a wave shape rounding and smoothing occurs as the
cutoff frequency is lowered, or reduced. [see Filter Talk, pp. 63-64 for
highly illuminating commentary on the Boomstar’s filter types]
