FXpansion DR-008 - Manual (Page 21)

21
fxpansion DR-008
www.fxpansion.com
VCA1 and VCA2 are amplifiers and amplitude envelope generators. The controls are
fairly self-explanatory: attack rate, decay rate, release rate (rate of decay after note-
off), gain, and velocity->gain. This last control is used to make the Ultra Sampler
respond to velocity in the normal way, playing higher velocities louder (or it can be
set to work in reverse, if you prefer!).
VCF1 and VCF2 are ‘Moog-style’ 24dB resonant filters, switchable from low pass
to high pass (via the ‘response curve’ button at the top of each filter). Cutoff and
resonance are as you would expect; Sweep controls the amount of enveloping
(positive or negative) that’s applied to the cutoff frequency; Decay controls how
quickly the envelope decays.
Note that UltraSampler does not have a Band Pass or Notch filter, but these can
be accomplished with the existing filters, using one as a high-pass and one as a
low-pass and overlapping the cutoff frequencies.
The Drive unit sits between the two filters on the signal path; it’s a fairly
straightforward waveshaping distortion unit with ‘positive’ or ‘negative’ shaping
depending on the position of the Drive knob. The Sweep knob controls the
behaviour of the distortion unit over time – to the right of center, distortion
increases with time; to the left of center, it decreases.
4.2.3 Quad Sampler
Quad Sampler provides four Easy Sampler units in a single
module. In addition, it allows you to set velocity response
ranges for the four channels (top screen area – velocity 0
is on the left, 127 on the right, and the Y-axis represents
volume – so in this case oscillator 2 fades in towards vel.30,
increases up to about vel. 60, then fades out as oscillator 3 fades in). It also
provides an ‘X-Y’ vector mixing pad for crossfading between the oscillators;
the ‘VX’ and ‘VY’ allow you to control the vectoring ‘crosshair’ position from
the note velocity.