Sequential Prophet VS - Page 133

133
Filter
Although the lter envelope is set up for a short percussive spike with a
sharp, positive-going release, it has no eect. Filter Cuto is maximum,
so the envelope has no eect even though Env Amount is also maximum.
Similarly, the minor amount of keyboard modulation applied to the lter cuto
has negligeable eect. However, as Cuto is lowered, the eects of the lter
envelope and velocity control become more pronounced. In the moduation
section, the lter envelope source is not routed to any destinations.
LFO Group
All voices are initially panned near center, but LFO 2 slowly pans them towards
either side by a programmed amount. LFO 1, running even slower than LFO 2,
inuences LFO 2's rate and depth of modulation, eventually determining how
far voices are panned away from the center position.
Running much slower than LFO 2, LFO 1 also modulates oscillator D and the
B-D mixer axis. Since its initial modulation amount is zero, its eect can only
heard by using the Mod wheel. As LFO 1 enters its positive phase, oscillator
D is emphasized (and oscillator B de-emphasized) as its pitch rises, causing
beating to increase between oscillator D and oscillators A and C.
Although turning the Mod wheel full up reveals that LFO 1 also modulates LFO
2's rate and depth, raising the Mod wheel beyond one third of its travel pushes
the oscillator D modulation to its tolerable limits.
Pressure, on the other hand, increases both modulation amounts, and with its
maximum inuence limited (modulation amount is +23), does not run the same
risks as the Mod wheel.
Voice Control
The amplier envelope begins with a spike, then decays to zero in two stages
in about three seconds. If keys are relesed before this decay is complete, a
nal clinking sound is heard, produced by the mixer envelope.
Stepping through the modulation section with Source Select and DestSelect,
we nd that velocity adds to the amplier envelope amount. Since Program
Volume is set at a medium level, velocity controls the volume between 56 and
99.
Arpeggiator
The arpeggiator operates in "Extend" mode. That is, any keys played (not
necessarily held) are added to the arpeggiation. If Split is switched on, then all
notes on the keyboard are arpeggiated similarly, regardless of their position
relative to the split point. If desired, select the arpeggiator SPLIT option, and
set to "DUAL". Notes to either side of the split point are then arpeggiated
separately.
HOME

BACK