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298 Chapter 21 EXS24 mkII
Hold via
This parameter determines the modulation source used to trigger the sustain pedal
function (hold all currently played notes, and ignore their note off messages until the
modulation source’s value falls below 64). The default is MIDI controller number 64 (the
MIDI standard controller number for hold functions). You can change it if there are
reasons to prevent Sustain from using CC 64, or if you wish to trigger Sustain with
another modulation source.
Crossfade (Xfade) parameters
If you are familiar with the concept of layering sample zones by Velocity Range, the
Xfade parameters allow you to crossfade between layered sample zones with adjacent
Velocity Range settings. If you are not familiar with this idea, here’s a short explanation:
When assigning a sample to a zone, you can set the lowest and highest velocity that
will trigger that zone. The range in between these values is the zone’s Velocity Range.
You can layer your zones by having different zones triggered by the same key, but
different velocities.
For example, if you have a sample of a snare drum hit lightly and a little off center
assigned to Zone #1, and a sample of a snare drum hit hard in the center of the drum
heading Zone #2. If Zone #1 has a Velocity Range of 24 to 90, and Zone #2 has a
Velocity Range of 91 to 127, if both zones are assigned to the MIDI note A#2, the zones
can be said to be layered on A#2.
In the example above, the high Velocity Range parameter of Zone #1 and the low
Velocity Range parameter of Zone #2 are adjacent, and at this point, there will be a
rather abrupt change from the audio sample used in Zone #1 to the audio sample used
in Zone #2. To make this less abrupt, the crossfade parameters lets you smoothly fade
between both samples. When you have distinctly different audio samples in adjacent
zones, you will find crossfading very helpful in creating realistic sampler instruments.
Crossfades are controlled by two parameters: Amount and Type.