8

Chapter 21 EXS24 mkII 323
Loop Parameters
The EXS24 mkII can loop playback of either all or a portion of an audio sample, when
you trigger a sample to play. In other words, the sample will loop when sustained MIDI
notes are received.
 Loop On checkbox: Activate this checkbox and the rest of the Loop parameters
become available for editing.
 Loop Start, Loop End: You can define discrete loop start and end points in these
fields, allowing you to loop a portion of the audio file. Clicking on the small E button
between the two values will open the audio file the Logic Express Sample Editor,
allowing you to set the loop start and end points graphically: Loop Start is
represented by the LS marker and Loop End, by the LE marker. “Editing Samples in
the Sample Editor” below.
 Tune: Allows you to change the tuning of the looped portion of the audio file in cent
increments.
 Xfade (Crossfade): In a crossfaded loop, there is no hard cut between the loop end
and loop start points. Rather, the loop end and start points are crossfaded for a
smooth transition. This is especially convenient with samples that are hard to loop,
and would normally produce clicks at the transition point—the join in the loop. The
Crossfade field allows you to determine the time of the crossfade. The higher the
value, the longer the crossfade, and the smoother the transition between the loop
end and start points.
 E. Pwr (Equal Power) checkbox: Allows you to enable an exponential crossfade curve
that causes a volume boost of 3 dB in the middle of the crossfade range. This will
fade out/fade in the joined portions of a loop at an equal volume level.
Note: The perfect settings for the crossfade parameters depend on the sample
material. A loop which cycles reasonably smoothly is the best starting point for a
perfect crossfade loop, but a crossfaded loop does not always sound better. Just
experiment a little with the parameters, and you’ll soon find out how, when, and where
they work best.