Lowpass Filter, Envelopes - Kurzweil K2600 Musician's Manual

Programming Examples
First, select the Trig parameter, and assign a value of VTRIG1 (press 1, 0, 6, Enter or hold Enter
and strike D
Attack parameter to a value of .78 seconds. The ASR page should now look like this:
EditProg:ASR|||||||||||||||<>Layer:1/1||
||||||||||||||||||||||||||||||||||||||||
||||||Trig:||Mode:|Delay:|Attack:Releas:
ASR1:|VTRIG1|Hold||0.34s||0.78s||1.00s||
ASR2:|ON|||||Hold||0.40s||0.48s||1.00s||
||||||||||||||||||||||||||||||||||||||||
||||||||||||||||||||||||||||||||||||||||
<more||ALG||||LAYER||KEYMAP|PITCH||more>
Notice that the soft buttons are identical to those on the PITCH page; this is because you pressed
Edit to call up the ASR page, instead of using the <more> soft buttons.
To make the stab sound realistic, weÕll drop the amplitude at the same rate as the pitch. To do
this, select the F4 AMP page (press the more> soft button once, then press the F4 AMP soft
button). Select the Adjust parameter, and assign a value of 8 dB. This will give the trumpet a bit
more punch. Next, select the Src1 parameter, and set its value to ASR1. Then select the Depth
parameter and set its value to -68 dB.
HereÕs an important point to remember: ASR1 is being used to control both the drop in pitch for
the stab, and the drop in amplitude as well. All of the control sources can be similarly assigned
for as many parameters as you like.
The Þnal step in this example is to set the velocity threshold of the stab. Right now the stab is
occurring on almost every note, but we want it to happen only when playing fortissimo or
louder. To do this, press the more> soft button three times, then press the VTRIG soft button to
select the VTRIG page. The VTrig1 Level parameter is already selected, so just turn the Alpha
Wheel until the VTrig1 Level value is ff. Now you can play softly without triggering the stab.
ThatÕs it for Example 1. If you want to save your work, the easiest way is to press Exit. The
K2600 will ask you if you want to save. You should probably press the Rename soft button, give
your program a new name, then save it with a new ID. See page 5-3 if you need help with the
Save dialog.
Example 2

Lowpass Filter, Envelopes

This example will show you how to assign a DSP function to an algorithm block (the 4-pole
lowpass Þlter), and adjust its control parameters. YouÕll also set up an envelope to control the
cutoff frequency of the Þlter.
Start with Program 199, press Edit, and select the KEYMAP page (This is explained in a bit more
detail in the previous example, if you havenÕt read it.) Change the value to 6 Ensemble Strings.
String sounds are especially responsive to lowpass Þltering, because they have a great deal of
activity in the higher frequencies. Lowpass Þlters, depending on their cutoff frequencies,
attenuate high frequencies, so a bit of adjustment can alter a string sound considerably.
Next, press the ALG soft button to select the ALG page. The center DSP function block will
already be selected. Set its value to 4POLE LOWPASS W/ SEP. Notice how the sound changes.
20-4
#
5). Select the Delay parameter and set its value to .34 seconds (3, 4, Enter). Set the