F-em User Guide
modulate a Level Envelope Attack with a negative value
to create a sharper attack phase the harder you play a
key or reduce the LFO Fade time to let a vibrato come in
faster the harder you play.
•
Release Velocity
(
Rel Vel
): After releasing a key on your
MIDI keyboard, the release velocity can also be used as
modulation source.
•
Channel Pressure
(
Ch Press
): Also known as Aftertouch
can be used as a modulation signal. The majority of
contemporary keyboards are capable of generating this
messages. When you press harder on a key you are
already holding down, a MIDI Channel Pressure message
is generated. This feature makes sounds even more
expressive (e.g. through vibrato). Channel Pressure is
unipolar.
•
Poly Pressure
(
Poly Press
): The minority of
contemporary keyboards are capable of generating this
messages. However, most sequencer software is able to
produce such messages. For every key you are pressing
harder after already holding down, a single MIDI Poly
Pressure message is generated. This feature makes
sounds even more expressive (e.g. through vibrato). Poly
Pressure is unipolar. Poly pressure is an important
modulation source when using the MPD (MIDI Polyphonic
Expression) option of F-em.
•
Controllers
sources:
• The
Pitch Bend
wheel or some
similar control found on most MIDI
keyboards. Most of the time it has
a spring attached to it to reset the
wheel to its center position
automatically when no force is
applied to it. Pitch Bend is a
bipolar modulation source. Use
Pitch Bend typically to change the
overall Pitch slightly for bent notes
or manually generated vibrato, or modulate Filter Cutoff
to brighten or dampen a sound.
• The
Modulation Wheel
(
Mod Wheel
) is another control
found on most MIDI keyboards right beside the Pitch
Bend wheel. Sometimes its integrated into the Pitch Bend
wheel, e.g. as a pressure sensor or part of the joystick. It‘s
a unipolar modulation source and, depending on the
keyboard manufacturer, the control stays at the position
where it has been set to or moves back to a zero position
when no force is applied to it. Use the modulation wheel
to blend in modulations, as the name implies, like a pitch
vibrato, by pressing both
LFO1
and
MW
in the Assign
section, followed by adjusting the
Pitch
modulation depth
on the Layer page (in the Common Assign section). You
can also use it to control other aspects of a sound, e.g.
fade in a
LFO
, increase
Drive
or change the
Effect Mix
.
•
Sustain
: This pedal message (MIDI CC #64) can be used
as modulation sources. If a value greater or equal than 64
is received, the “Key Pressed” envelope phases of all
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