Audio Damage Dr. Device - Manual (Page 11)

The FILTER MODE switch chooses between two different tone-control options for the delays. In the BBD
position, the delays include a variable low-pass filter whose frequency depends upon the delay time. As the
delay time increases, the filter’s frequency decreases, recreating the limited-bandwidth characteristics of
analog delays that used “bucket-brigade” delay circuits. In the DIGI position, the low-pass filter has a fixed,
fairly high frequency, providing a gentle amount of high-frequency roll-off which helps the delayed signal mix
well with the original.
The ACTIVE switch connects and disconnects the delays from the signal path. If the ACTIVE button is set to
OUT the inputs to the delays are muted. Click either button to switch between IN and OUT.
3. The XYZ Pad
The square region in the center of Dr. Device's window is a two-dimensional control called the XYZ pad. The
XYZ pad has two circular handles that can be moved horizontally and vertically when you click and drag them
with the mouse. For brevity, and lack of a better term, we refer to the circular handles as nubbies. Borrowing
from geometry, the letters X and Y refer to the directions, or axes, that you can move the nubbies. X refers to
the horizontal direction or axis, Y refers to the vertical direction/axis. The nubbies also have a third axis called
Z, whose value is determined by whether or not the mouse button is clicked when the pointer is over the
nubby
1 . Usually you'll use your mouse or other main input device to move the nubbies, but you can also move
them with MIDI Continuous Controller messages.
The DEST buttons (short for Destination) and sliders next to the lower-left and -right corners of the pad let
you use the nubbies to control Dr. Device's parameters. The controls on the left are for the light-colored
nubby; those on the right are for the dark nubby. (Notice the small images of the nubbies on the Dest
buttons.) Each nubby can control up to three parameters at once. You can control only one parameter with
each nubby axis, and, conversely, any parameter can be controlled by only one axis.
The range sliders determine the range of values over which movements of the XYZ nubbies change their
destination parameters. Each range slider has two moveable handles. The left handle sets the lowest value
that the destination parameter will reach when controlled by the XYZ pad. The right handle sets the highest
value that the parameter will reach.
1 Yes, since there are actually three axes of motion, technically we could call Dr. Device's pad a three-dimensional
controller. That sounds a little presumptuous, though, doesn't it?