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ADD-one Manual
SECTION
6
This "pitch bending"
capability
can also be
controlled by envelope
generator
2,
which however works "statically",
i.e.
not
dynamically with
the beat. As soon as
a
specific trigger threshold value
is
exceeded, the
EG2 will start
to
run and decay
according
to its
setting.
A
similar
principle applies
to
control by the LFO
(see
Section
6.4 and 6.5).
6.3
Possible Applications
of the
Filter Functions
The ADD-one
is
provided with
a
programmable digitally controlled filter
for each of the
eight channels. These are low-pass filters with sharp
edge steepness. Low-pass means that
virtually
all tones are let
through
below
the
cut-off frequency whereas sounds above
this
threshold
are
dropped
24
dB/octave. The frequency response has more
or
less the
following appearance:
•CUT-OFF'-
PUNKT
The
frequency response
can be
reduced
(-)
or
increased
(+)
using
the
parameter FILTER. The value
"00"
has been
selected
for
various samples,
but always
to
ensure that
the
instrument sounds
its "most
natural".
It
may also
be the
case that
for the
value
"00" the
filter will
be at
the
upper end
of the
bandwidth
of the
sample
(=
1/2
x
sampling frequency).
Shifting
the
cut-off point upwards, therefore, will
not increase the
pitch
of the
sound.
During operation therefore,
the user
may
be
experience that by increasing
the filter
cut-off frequency,
no
audible
difference will
be
produced above
the
value
+15. This
is
no
fault
of the
unit but
is
inherent
in the
nature
of the
matter.
You will soon gain an
impression
of the
acoustic effect
of the
filter
by
striking
a
torn
aggressively which will
pull the filter back: the beat
will sound dampened.
With parameter FILTER BEND,
the
cut-off frequency
of the
filter can now
be
shifted up
or
down dynamically
in
relation
to
the
strength
of the
beat. Select
a
high TOM and set
the
FILTER
to -74,
FILTER BEND
to
+
99
and
BEND DECAY
to 64.
-
117
-
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