Kurzweil K2500 - PERFORMANCE GUIDE REV F PART NUMBER 910252 CHAP 12 Manual page 2

Glossary
Dialog
Digital
Digital Signal
Processing
Drum Program
Editor
Envelope
File
Global
Hard Reset
Keymap
12-2
A page that prompts you to enter information that the K2500 needs in order to execute
an operation. Dialogs appear, for example, when you initiate a Save or Delete
operation.
A term used widely in electronics-related fields to describe a method of representing
information as a series of binary digits (bits)—1s and 0s. Digital computers process
these strings of 1s and 0s by converting them into an electrical signal that is always in
one of two very definite states: "on" or "off." This is much more precise than the
analog method, therefore digital computers can operate at speeds unattainable by
analog devices. Digital synthesizers like the K2500 are actually computers that process
vast strings of digital information signals, eventually converting them (at the audio
output) into the analog signals that flow into PAs and other audio systems. See also
Analog.
The term "Signal processing" refers to a vast range of functions, all of which have in
common the fact that they act upon an electric current as it flows through a circuit or
group of circuits. A simple form of signal processing is the distortion box used by
many guitarists. Digital signal processing refers to similar processes that are
performed by digital (see) circuitry as opposed to analog (see) circuitry. Many of the
effects devices available today use digital signal processing techniques.
The only difference between a drum program and an ordinary program is that a drum
program can contain up to 32 layers instead of the usual maximum of three. Since
each layer has its own keymap and algorithm (not to mention all the other control
sources), this gives you enormous control over whatever sounds you assign to the
layers in a drum program.
The complete set of parameters used to modify a particular aspect of the K2500, for
example, the currently selected Program, which is modified with the Program Editor.
The Program Editor spans several display pages, which can be viewed by using the
soft buttons (the ones labeled "<more>."
An aperiodic modifier. In other words, a way to cause a sound to change over time
without repeating the change (unlike periodic modifiers like LFOs, which repeat at
regular intervals).
A group of objects stored to a floppy or hard disk, or loaded into the K2500's RAM
from disk.
In this manual, used primarily in reference to control sources. A global control source
affects all notes in a layer uniformly. If a layer uses a global control source, that control
source begins to run as soon as the program containing it is selected. Its effect on each
note will be completely in phase, regardless how many notes are being played.
Compare Local.
Resets all parameter values to their defaults, and completely erases the contents of
RAM. Press the Reset button in Master mode to do a hard reset. This is a quick way to
restore the factory defaults to your K2500, but EVERYTHING in RAM (all the objects
you've created) will be erased, so objects you wish to keep should be saved to disk or
SyxEx dump. A hard reset should not be used to recover if your K2500 is hung up,
except as a last resort. See Soft Reset.
A keymap is a collection of samples assigned to specific notes and attack velocities.
Keymaps usually contain numerous sample roots pitch-shifted across a range of
several notes. When you trigger a note, the keymap tells the K2500 what sound to
play, at what pitch, and at what loudness.