E-Mu ProteusX Operation Manual page 28

2 - Proteus Architecture
A Modular System
Normally these samples would be placed side by side on the keyboard as in the diagram
above. You assign the sample to a range by setting the original key, (which is usually the
original pitch of the sample) a high key and a low key. The number of samples needed
for a realistic emulation varies with the instrument, but in general, "more is better."
You can place the voice (and its sample) anywhere on the keyboard. If more than one
voice is assigned to the same range, then pressing a key in that range plays all the voices
assigned to that range. Voices assigned to the keyboard can be crossfaded by their
position on the keyboard, or the key stroke velocity. Voices can also be switched or
faded depending on the value of a realtime controller such as a modulation wheel, an
LFO or an envelope generator.
28 Proteus X Operation Manual