Oberheim Xpander Owner's Manual

VCF/VCA
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The VCF/VCA
page
contains
the controls
for the
filter
as
well
as two
output
amplifiers.
There
are
two pages
of controls
for
the filter.
You have just
accessed
the
first
page.
The top
display
m the
page
modifier section shows
the names
of the controls,
which are from
left:
^MM
FREQ
RES
MODE
VCRI
VCR3
SWITCH MODE
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SWITCH MODE
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PAGE
2
FREQ
/
The cutoff
frequency
or the frequency that
the
filtering
starts at.
This
control is
unique
in that it goes
from to
127
RES
/
Filter resonance.
This
control
accentuates
the sound
right
at
the
filter
frequency.
Turning the
resonance up
gives a
nasal
sound and can be
used to
create a
resonant
swell or
wa-wa
sound
The
resonance on the
Xpander
filter
is unique because
it can be
modulated
by
any modulation
source,
for
some
striking
effects.
Setting the
resonance
to
63
(all the way
up)
will cause the
filter to
oscillate in some mode
settings,
allowing it to be
used as a
sound
generator.
MODE
/
The
filter's
mode.
This is another
unique
Xpander
function that
is
explained
below.
VCA
1
/
VCA
1
's
initial output
volume.
VCA 2
/
VCA 2's
initial output
volume.
Modulation
The
frequency and
resonance of the
filter, and both
VCAs
can be
modulated
by
other
sources.
These
modulations
are
quite important in
achieving
the
desired sound
character.
See
the
section on
Modulation
Pages.
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Xpander Owners
Manual Creative
Input/The
Xpanded Voice

Oberheim Xpander Specifications

General

Type	Analog Synthesizer
Polyphony	6 voices
Oscillators	2 VCOs per voice
Control	MIDI
Synthesis Type	Analog Subtractive
VCA	1 per voice
Memory	100 patches
Modulation	Extensive modulation matrix
Year Released	1984
Filters	Multi-mode filter per voice
Envelopes	3 per voice
Keyboard	No keyboard
Inputs	CV/Gate
Outputs	Individual voice outputs