Playback Mode; Alternative Switch (Altcontrol And Altmethod) - Kurzweil K2661 Musician's Manual

Program Mode and the Program Editor
The KEYMAP Page

Playback Mode

This gives you numerous options for manipulating the samples in the current layer as you
trigger them. Normal leaves the samples unaffected, while Reverse plays them in reverse. At a
value of Reverse, the samples will continue to loop as long as notes are sustained. To play them
just once in reverse, you would adjust the length of the layer's amplitude envelope (explained
later in this chapter). BiDirect (bidirectional) causes the samples to loop infinitely, alternating
between normal and reversed playback. Noise replaces the samples with a white noise
generator.
ADAT In 1 through ADAT In 8 let you route an external digital signal to the layer's sample. This
signal then gets processed by the layers' DSP algorithm and sent to the layer's output. Using
this value disables most of the other KEYMAP-page parameters for the layer.
Note: To use ADAT In, the K2661's ADAT Out cable must be connected to the sending device. K2661
must be the "master," and the other device(s) must "slave" to it. Output sample rate (and therefore input
as well) is fixed at 48 kHz.
Using the ADAT inputs bypasses the PITCH page in the current program, so nothing on the
PITCH page has an effect. If the current program uses a natural amplitude envelope, the signal
at the ADAT In uses the current keymap's amplitude envelope and volume adjust parameters.

Alternative Switch (AltControl and AltMethod)

You can assign a control source to change the sound by using an alternative start point or
alternative end point for the current keymap. Whether it is an alternative start or alternative end
depends on the position of the Alt parameter for the sample (set in the Sample Editor). When set
before the end point, it is used as an alternative start (the Alt point can be before or after the
normal Start point). When set after the end it is used as an alt end.
Use the AltControl parameter to specify a control source that will cause the sample to begin or
end at the Alt point. Then use the AltMethod parameter to choose between switched and
continuous calculation of the Alt point. If the value of AltMethod is Switched, the K2661 will
use the Alt point when the relevant control source is at a value greater than 64 at Note Start. If
AltMethod is Continuous, the Alt point will vary depending on the value of the relevant control
source at Note Start.
As an example, suppose you're editing a two-second sample. You've set the Start point at 0.000,
and the Alt point at 1.000 (this is done on the TRIM page in the Sample Editor). Now you return
to the KEYMAP page in the Program Editor, and you set AltControl to MWheel. If you set
AltMethod to Switched, the sample will begin at the 1-second point if the Mod Wheel is at least
halfway up at Note Start. If you set AltMethod to Continuous, the K2661 will interpolate the
sample's starting point based on the position of the Mod Wheel. If the Mod Wheel is halfway up
(64) at Note Start, the sample will begin at the half-second point. If the Mod Wheel is 75% up
(96), the sample will begin at the .75-second point, and so on.
Emulating Legato Play
If you place the Alt point after the initial attack transients of the sample, then you can use the Alt
Switch to emulate legato playing in an acoustic instrument. As an example, set Keymap to
14 Flute. Now set the AltControl parameter to Chan St (Channel State). Now if you play notes
separately, the initial breathy chiff will be heard. But if you play the notes legato (connecting
them smoothly), the Alt point is used and you do not hear the chiff. This is because the Chan St
is turned on as long as any note is being held. Most of the K2661's ROM samples have their Alt
points set for purposes of legato play. In most cases the difference in attacks is subtle, but for
some sounds, like drums, the difference can be more noticeable.
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