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Basic Effects Mode
The Structure of Kurzweil Digital Effects (KDFX)
Use the left and right cursor buttons to select each block. When a block is selected, move the
alpha wheel or press the + or - buttons to select a different FX Preset (you can also change the
Preset by cursoring to the full name of the Preset after the FX: label).
Notice that the unhighlighted blocks have a box around them. This shows they are active. Since
this studio has 4 blocks, each block can use only 1 PAU. If you select an effect that uses more
than one PAU, one of the blocks will become inactive and the box surrounding that block will
disappear. For example, if you change the first block to FX Preset 183 NarrowResFlange, the box
around block 4 disappears. The top line of the display shows you this FX Preset uses 2 PAUs. As
in the past, if the Allocation parameter is set to Auto, the lower number blocks have precedence,
so block 4 is the one that becomes inactive. If you highlight block 4 at this point, you will see the
FX Preset shown in parenthesis, again showing it is not active.
The Chan/Bank buttons move you through the four FXBUSes. Since no effects are available in
this case, you will see a line with no blocks on them if you look at any bus except FXBUS 1. You
can still use a bus to send another signal to the AUX without the chain, by the way, since KDFX
has been designed to offer you maximum flexibility.
Gain Staging in Effects Chains
When chaining Presets together, it is sometimes necessary to adjust the levels between blocks,
most often to pad the level going into the next block to prevent unwanted clipping. While most
algorithms have both an In Gain and an Out Gain parameter, In Gain is not selectable as a Bus
Mod. In fact, any Preset beyond the first in a chain cannot use In Gain, and will display the value
inside the Preset in parentheses. We suggest, when necessary, choosing Out Gain as a Bus Mod
to adjust the output level of an effect, instead of trying to pad the input of the following effect.
Of course, you can always edit FX Presets directly and customize them for your chain.
Checking Out Some Chains
For examples of studios with chains, check out studios 700-719. By setting the FX Ctrl parameter
(KDFXMode:CTRL page) to Master, and the OutPair parameter (MIDIMode:Channels page) to
KDFX-A, you can scroll through Programs on a given MIDI channel and audition these studios
as they were intended to be heard, with a variety of input source material.
The Structure of Kurzweil Digital Effects (KDFX)
The Studio
All Effects-mode functions are contained in a studio. Only one studio is active at a time.
Each studio has four stereo or eight mono inputs. The sources for these inputs are the four
output pairs available in two places: the Pair parameter on the OUTPUT page in the Program
Editor, and the Out parameter on the CN/PRG page in the Setup Editor. In both cases, the
available values are KDFX-A, KDFX-B, KDFX-C, and KDFX-D. Instead of going directly to the
K2661’s physical outputs, these program outputs go to the inputs of a studio. Only after going
through the studio does the audio output appear at the physical outputs. The inputs to the
studio can come from one multi-layered program, or from several programs, or from the
K2661’s own sample input when the instrument is in Live mode.
The input signals pass through an input routing system, as specified by the settings on the
INPUT page in the Studio Editor. Here, the signals go through individual two-band equalizers,
or EQs. Then each input, mono or stereo, is routed to any two of the four FXBuses.