Kurzweil KDFX Manual page 97

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Sometimes you can hear the snaps back and forth when the LFOs and the buffers get out of

sync. You might be able to smooth out the rough spots by making another layer with no pitch

alterations, and crossfading between the layers:

Duplicate the layer

Clear all the settings on the PITCH page

Go to the OUTPUT page and assign Crossfade: Mwheel on both layers.

On layer 1, set XFadeSense to Rvrs; on layer 2, set XFadeSense to Norm.

Now at the Mod Wheel extremes, you will hear only one layer or the other, while in the middle,

you will hear a combination of the pitch-modulated signal and the unmodulated signal. By

experimenting with FUNs, you can get more precise crossfades.

The program 744 LM Synth Sliders includes this kind of crossfade, tied to the Pitch Wheel, to

implement a 3-layer crossfade. Moving the Pitch Wheel up fades to a layer which is bending

the pitch up. The surprise is that moving the Pitch Wheel down bends the pitch down, then up

again, crossfading to a layer that is playing back in reverse! Yes, reverse playback works with

Live Mode: on the KEYMAP page, set PlayBackMode to Reverse. A temporal vortex? Hmmm.

Arpeggiator

You can also do controlled pitch shifting on incoming audio using the arpeggiator. By

constantly sending new note starts, it is possible to bend the pitch without losing the tempo of

the incoming signal.

It can work in both directions, although when you are shifting signals up in pitch, youÕre

ÒborrowingÓ the audio from a few seconds previous.

Go to Setup Mode and select 97 Control Setup.

Press Edit, and on the CH/PRG page, set the program to 749 LiveMode Default.

With the Program highlighted, press Edit and go to the AMPENV page.

To make the crossfading less choppy, you want short attack and release segments: set Att1

to 0.06/100% and Rel1 to 0.10/0%.

Press Exit and save the Program to some new location.

Now go to the ARPEG page and set Active:On.

Set the Duration to, say, 99%.

For this example, set Order:Simultaneous and Beats:1/32.

Tempo should already be 120BPM.

Now play C4 and you will hear the live signal at the correct pitch. Play G3 and you will hear

the signal pitched down a fourth. You can use the ribbon or similar controller to bend the pitch

smoothly. Going above unity pitch will cause a jump back into the past.

Experiment with the Tempo, the Beats setting, the Duration value, and the AMPENV

parameters to get useful variations on the program. Remember that because we set the Order to

Simultaneous, you can play several notes at once. And Þnally, try setting Glissando:On.

Special Topics

Live Mode

6-3

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