Kurzweil K2500 - PERFORMANCE GUIDE REV F PART NUMBER 910251 CHAP 6 Manual page 8

Program Mode and the Program Editor
Common DSP Control Parameters
upward in large amounts. The oscillator waveforms can be pitched higher. Any sound can be
pitched downward without limit.
The primary use of the Adjust parameters (Coarse and Fine) is to offset the cumulative effects of
the other parameters on the control input pages. For example, you might set a high value for
key tracking (defined below) for a dramatic change in effect across the keyboard. The effect
might be too much at one end of the keyboard, however, so you could use one of the Adjust
parameters to reduce the initial amount of that effect.
The K2500 always uses real values of measurement, rather than just arbitrary numbers, for
adjustable parameters. This means that you specify pitch in semi-tones and cents, amplitude in
dB, and filter cutoff frequency in hertz.
Remember that the parameters on the control input pages are cumulative—they can add to or
subtract from the effects of the other parameters on the page, depending on their values. For
example, even if you've adjusted the pitch of a sample so high that it pins, the effects of the
other parameters may bring the pitch back down to a workable range.
Fine Adjust
You can add slight detuning to the pitch by changing the fine adjust parameter. Notice that
there are actually two fine adjust parameters on the PITCH page: one that changes the pitch in
cents (100ths of a semitone), and one that changes it according to its frequency (in increments of
Hertz—cycles per second). Since we're discussing the universal control sources here, and not
specifically pitch, we'll move on for now, as the "Fine Hz" parameter applies only to pitch-
related functions. See "The PITCH Page," later in this chapter, which describes Fine Hz more
thoroughly.
Key Tracking
This is a quick way to get additional control based on the MIDI note number of each note you
trigger. Key tracking applies a different control signal value for each note number. In the case of
pitch, key tracking enables you to change the tuning of each note relative to its normal pitch.
Middle C is the zero point. Regardless of the key tracking value, there is no effect on Middle C.
If you set a non-zero value for key tracking, the effect increases for each note above or below
Middle C. In the case of pitch, for example, say you assign a value of 5 cents per key for the key
tracking parameter. Triggering Middle C (C 4 on the K2500) will play a normal C 4. Triggering
C# 4 will play a note 5 cents higher than C# 4. Triggering D 4 will play a note 10 cents higher
than D 4, and so on. Notes below Middle C will be tuned lower than their normal pitches. If
you set a negative value for key tracking, notes above Middle C will be tuned lower than their
normal pitches.
Keep in mind that key tracking on the PITCH page works in conjunction with the key tracking
parameter on the KEYMAP page. This is why you can set the KeyTrk parameter on the PITCH
page to 0ct/key, and the K2500 will still increases in pitch by 100 cents/key as you go up the
keyboard. It's because the KeyTrk parameter on the KEYMAP page is already set at 100 cents/
key.
Velocity Tracking
A positive value for velocity tracking will raise the pitch as you trigger notes with higher attack
velocities. This is great for getting a trace of detuning based on your attack velocity, especially
in drum programs, where you can make the pitch of the drum samples rise slightly with
higher-velocity Note Ons, just as drums do when you strike them harder. Negative values will
lower the pitch as you increase the attack velocity.
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