Kurzweil PC2 [62/170] Offset vs scale

4-18

Programming Your PC2

The Setup Editor

18. Save again, replacing Setup 133 without renaming.

As you move the slider down to the midpoint, the Controller value of the wet/dry mix for

the electric piano is 64, and the value for the acoustic piano is 0 (64 Ð 64). In the bottom

half of the sliderÕs throw, youÕll hear chorus only on the electric piano.

Offset vs. Scale

ThereÕs another way to adjust levels relative to each other that gives slightly different results.

1. Select Setup 133 if necessary, and press Controllers. Make Zone 1 current, if it isnÕt

already.

2. Set the offset for Slider A in Zone 1 back to 0.

3. Press < once, then press 5, 0, Enter. This sets a scale of 50% for the wet/dry mix.

Whereas an offset provides a uniform difference between the wet/dry mix for the acoustic and

electric pianos, scaling creates a proportional difference. As you move Slider A down from the

top, the difference in the wet/dry mix values between the two sounds gets smaller, until they

meet at 0.

Crossfades

You can use a single continuous controller to fade one sound out while it fades another sound in.

This is called a crossfade.

1. Create a two-zone setup, as you did in the example on page 4-13. Use a sustaining sound

in each zone: perhaps two different organs. (If you want, you can use Setup 129, and

change the piano to an organ.)

2. Press and hold Controllers, and move Slider A. Make Zone 1 current, if it isnÕt already

(press Zone 1).

3. Make Zone 2 current (press Zone 2).

4. Press >, then change the value of the Ctrl Scale parameter to -100%.

5. Press >, then change the value of the Ctrl Offset parameter to 127.

ThatÕs all it takes to create a crossfade. YouÕll notice a bit of a drop in volume at the midpoint

between the sounds. You can adjust that.

1. Starting from the previous example, press >, then change the value of Ctrl Curve to Cos+.

2. Make Zone 1 active, and change its Ctrl Curve parameter to Sin+. Notice the difference?

Explaining why this works can get a bit technical. The easy explanation is that the Sin+ curve

boosts the volume in the midrange, while the Cos+ curve cuts the volume in the midrangeÑbut

since weÕve inverted the curve with scaling and offset, it also boosts the volume in the midrange.