Kurzweil K2500 - PERFORMANCE GUIDE REV F PART NUMBER 910251 CHAP 6 Manual page 9

Source 1
This parameter takes its value from a long list of control sources (you can find it in the Reference
Guide—it's called the Control Source list) including every MIDI control number, a host of LFOs,
ASRs, envelopes and other programmable sources.
Src1 works in tandem with the parameter beneath it on the page: Depth. Choose a control
source from the list for Src1, then set a value for Depth. When the control source assigned to
Src1 is at its maximum, the pitch will be altered to the full depth you set. For example, if you set
Src1 to "MWheel," and set Depth to 1200 ct, the pitch will rise as you push the Mod Wheel up
on your MIDI controller, reaching a maximum of 1200 ct (12 semitones, or one octave).
Source 2
This one's even cooler. Like Src1, you choose a control source from the list. But instead of
setting a fixed depth, you can set a minimum and maximum depth, then assign another control
source to determine how much depth you get. Try this example. (Make sure Src1 is set to OFF
first, so the two sources don't interact). Start with Program 199, and press EDIT. Press the
PITCH soft button to select the PITCH page. Set the Src2 parameter to a value of LFO1, then set
the Minimum Depth parameter to 100 ct, and Maximum Depth to 1200 ct. Then set the Depth
Control parameter to MWheel. This lets you use your MIDI controller's Mod Wheel to vary the
depth of the oscillation in pitch generated by the LFO.
Now, when the Mod Wheel is down, the pitch will oscillate between a semitone (100 ct) up and
a semitone down (the default waveform for LFO1 is a sine wave, which goes positive and
negative—if this perplexes you, see the Reference Guide, where there's an explanation of how
the K2500 generates and interprets control source signals). With the Mod Wheel up, the pitch
will oscillate between an octave up and an octave down.
Since the Mod Wheel is a continuous control, you can achieve any amount of depth control
between the minimum and maximum. If you had set the Depth Control to Sustain, for example,
then you'd get only two levels of depth control: the maximum (1200 cents) with your MIDI
controller's sustain pedal down, or the minimum (100 cents) with the sustain pedal up.
Summary of Common DSP Control Parameters
These six control source parameters are just a few of the control sources available throughout
the Program Editor. We've given them special attention because they appear on all the pages
relating to the DSP functions, not just on the PITCH page.
As with the PITCH parameters, you can go to each of the DSP functions' control input pages,
and set a similar set of parameters to control each of those functions as well. The units of
measurement may differ, but you'll almost always find one or two adjustment parameters, key
and velocity tracking, and two programmable control sources. And remember, we've been
talking about one layer in one program here. You can add one or two more layers to your
program, and start all over with another identical set of control sources for each layer, each of
which can be programmed independently.
On any given page, the settings for the control parameters are added to each other before the
signal leaves the DSP function. Depending on the values you set, they may cancel each other
out, or they may add up to huge amounts of modulation. If things get out of control, the easiest
way to get a handle on the situation is to set some of the parameters to values of 0 or OFF.
Adjust the value for one parameter at a time to hear the effect of that one parameter.
Program Mode and the Program Editor
Common DSP Control Parameters
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