Kurzweil K2600 - MUSICIANS GUIDE REV A PART NUMBER 910330 CHAP 9 Effects Manual page 8

Basic Effects Mode
The Structure of Kurzweil Digital Effects (KDFX)
K2600Õs 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
K2600Õs own sample input when the instrument is in Live mode.
The input signals pass through an input routing system, as speciÞed 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.
Each of the FXBuses contains its own signal-processing program, called an FX preset. Each
FX preset has a set of parameters: for example the RT
on a delay line. These parameters can be Þxed as part of the FX preset, or they can be externally
controlled, from one of two different places. The four FXBuses are also called Insert FX, because
in a conventional studio, thatÕs where they would be found: in the insert loop of a mixer,
between the channel input and the Mix bus.
There is also a Þfth FX preset, which is located on the Auxiliary FX Bus (the Aux bus). The Aux
bus follows the four main FX presets in the signal path, and is normally conÞgured as a global
processor.
Each FX preset consists of an algorithm, modiÞed by user-deÞnable parameters. An algorithm is
a processing function, like a reverb, ßanger, or compressor; or a combination of processing
functions in a particular order, like a ßanger followed by a delay followed by a reverb. The
algorithms themselves are Þxed in ROM, like Kurzweil ROM samples, but you can change the
values of their operating parameters.
Each algorithm requires a certain amount of processing power, which is expressed in
Processing Allocation Units (or PAUs). Simple algorithms require 1 PAU, while more complex
algorithms require up to 4 PAUs. The amount of processing power available in each FX preset is
set by its Allocation parameter. When you are selecting an FX preset for an insert bus, the
number of PAUs its algorithm requires appears on the display, so you can keep track of how
many PAUs are in use.
PAUs are shared among the four insert buses. There is a limit to the total number of PAUs that
the insert buses can use, and that limit is four. PAUs can be manually preassigned to speciÞc
FXBuses, or using ÒAutoÓ mode they can be assigned automatically as FX presets are assigned
to the buses. The Aux bus has a separate set of PAUsÑthree of themÑwhich are not shared with
the insert buses.
Finally, the outputs of the FX presets are passed through to an output routing systemÑas
speciÞed by the settings on the OUTPUT page in the Studio EditorÑwhere they are sent to the
physical outputs of the K2600.
The following equation summarizes studio structure:
The next page shows a schematic overview of studio structure.
9-8
Studio = EQs + Input-page settings + FX presets + Output Editor settings
value on a reverb, or the Feedback level
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