Modulator Polarity - E-Mu XK6Xtreme Keys Owner's Manual

158 E-MU Systems

Modulator Polarity

You will notice that some of the modulation sources have symbols
following their names. For example, there are three Velocity modulation
sources, Vel +, Vel ±, and Vel <.
Control
Value
0
Control Value Applied
+
0
±
-63
<
-127
+
" " Modulation: Uses only the positive half of the range, adding to the
current value. For example, if the filter frequency were set to 100 and you
patched Vel+ to the filter, the filter frequency would increase from 100 as
velocity was applied.
±
" " Modulation: Uses both sides (full) range and both adding and
subtracting from the current value. For example, if the filter frequency
were set to 100 and you patched Vel ± to the filter, the filter frequency
would decrease from 100 with key velocities of 63 or less and increase from
100 with key velocities of 64 and above. Therefore with medium velocity,
the Filter frequency is approximately where you set it at 100.
An LFO ± works the same way; on the positive half of the cycle it increases
the initial amount and on the negative half of the cycle it decreases the
initial amount. With a ± modulation source, a value of 64 equals 0.
<
" " Modulation: Uses only the negative half of the range, subtracting
from the current value. For example, if the Amplifier Volume were set to
+3 dB and you patched Vel < to AmpVol, the volume would be at +3 dB
only when maximum key velocity were applied. Lower key velocities would
scale back the volume. In general, < modulation is the proper choice when
modulating Volume.
63 127
+ modulation ADDS to the
63
127
± centers around Zero.
(Use for LFOs, Filt. Freq.)
0
+64
< modulation SUBTRACTS
from the initial value
-63 0
Preset Edit Menu
PatchCords
initial value. (Normal)