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Square Wave before and
after Lag Processor
There are two
functions
combined on this page
One
»s
FM or
Frequency Modulation, the
other is
Lag.
Lag
Lag
is
equivalent
to portamento
on other
synthesizers, but
is configured tor
greatly
increased
flexibility on
the
Xpander.
Lay takes a
signal
with
an
instantaneous
transitions
such as
keyboard pitch,
and slows
the
transition. The
LAG
INput selects the source to
be
lagged,
while the
LAG
RATE controls the speed
of
transition.
For example classic
portamento is achieved by
taking
the
signal from
the keyboard
and
patching it though the
Lag
Processor before
sending it
to
the VCOs
However,
there
are
other things that can
be
done
with lag, such as
lagging the velocity
signal
to
the VGA or
filter
frequency,
or processing an LFO square
wave
through the Lag Processor to
create an exag-
gerated
transition,
as
the diagram
at
left
shows.
The rate
can also be modulated (see
Modu-
lation Pages).
The Lag
Processor
has several operational modes,
accessed
from Page 2
LEGATO
.'
When on
(underlined),
the
output
will
lag only
when notes going
to
that
particular
voice
are. played
legato, that is
slurred When notes are
played detached,
the output will not
lag This enables
lag
to be
applied expressively,
depending upon how the
keyboard
is
played.
When LEGATO »s
off. all notes
will
lag
Legato Lag
is most useful
when
playing one voice. Utilizing
Legato Lag polyp
honica
sly
requires
careful keyboard
technique To
cause
all six
voices to
lag
require:, that twelve <eys be
depressed
momentarily
EXPO-LINEAR
/
These
are two types
of
lag
timings.
LINEAR lags at a
constant
speed,
while
EXPOnentiai slows down
as
the
lag approaches its
final
destination.
EQUAL TIME
/
When in
LINEAR
mode,
the EQUAL
TIME display appears
and can be
selected.
When
EQUAL
TIME is on.
all notes will
take the same time to get
from one place to
another no matter how
far
the amount
of travel is
When off. all notes
will travel at the same
speed
no matter how
far the distance is. In
other words,
with EQUAL TIME
on. lag of
a
minor
second will take the same
time as
a
lag of
two octaves;
when off the two octave
lag
will
take
much longer than the
minor second.
FM
This
page
also accesses
the Linear
FM capability of the Xpander.
The controls
are for
the
FM
AMPIitude (which
of course, can
be
modulated
-see the
Modulation Page
Section).
and for the FM DESTination.
which can
be
VCOl or the
filter.
For more
information about
FM, see the
Synthesthesla Section
of
this manual
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/H Xpander Owners Manual Creative Input/The
Xpandcd
Voice
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