14-12
Keymap and Sample Editing
The Keymap Editor
The TRIM Page
The TRIM page lets you set the Start, Alternative Start, Loop, and End points of the current
sample. The
top line indicates the Zoom and Gain settings. This Gain setting doesn’t affect the
amplitude of the sample, just the view in the display. The right side of the top line displays the
root number of the sample. If the sample is part of a group of sample roots, you can use the
Chan/
Layer
buttons to scroll through each sample in the group.
The four parameters on this page are Start (S), Alternative Start (A), Loop (L), and End (E).
Selecting these parameters and adjusting their values enables you to modify how the sample
plays back when notes are triggered. Each of these parameter points are expressed in individual
samples. For example, a one second sample at a sample rate of 44,100Hz would have 44,100
values available to adjust for each of these parameters.
There is a vertical line in the center of the display indicating the placement of the current
parameter in the sample waveform. The sample waveform will move relative to the line when
each parameter is selected or adjusted. The line remains in the center of the display, and the
waveform shifts to indicate the new position of the point. Each parameter can be adjusted with
the -/+ buttons, the Alpha Wheel, or the alphanumeric button pad followed by the
Enter
button.
The
Start (S)
point determines the beginning of the current sample. You can truncate the
beginning of the sample by increasing the value of the Start (S) parameter. You might do this to
remove silence at the beginning of a sample, or to remove some or all of the attack. You can’t
decrease the Start point of samples below zero.
The
Alternative Start (A)
parameter lets you set a second, optional start or end point for the
current sample. The Alternative Start will be used when the Alt Switch parameter on the
KEYMAP page is set to
On
, or when it’s set to a specific control source and that control source is
generating a value of more than +.5. (For example, if you assign
MWheel
as the control source for
the Alt Switch parameter, the Alternative Start will be used when the Mod Wheel—or whatever
control source you have set to send MWheel—is above its halfway point.) The Alternative Start
can be set before, after, or at the same point as the Start or End.
If you set the Alternative Start after the End, you can extend the play of looped samples.
Normally, looped samples will play through to the End, then will loop back to the Loop point,
and continue looping like this until the note is released, when they go into their normal release. If
the Alternative Start is set after the End, looped samples will loop in the same way while notes
are sustained. As soon as you release the notes, however, the samples will play through to the
Alternative Start point before going into release.
The
Loop (L)
parameter sets the beginning of the looped portion of the current sample. The Loop
can be set at any point before the End, including before the Start and Alternative Start. If you try
to move it after the End, the End will move with it. When you’re setting a loop segment for a
sample, you should adjust both the Loop and End parameters so that the two ends of the
waveform would meet (or come as close as possible) when the loop occurs. You can do this
visually by zooming in close to the waveform (until it becomes a single line,) then adjusting the
Loop and End parameters of the waveform until both ends are the same distance above or below
