Specifications

Chapter 4: D-Fi 35
To use keyboard note entry:
1 Option-click (Macintosh) or Windows-click
(Windows) the Effect Frequency for the pop-up
keyboard.
2 Select the note on the keyboard that you want
for the Effect Frequency.
Modulation Type
Modulation Type determines the type of modu-
lation applied to the frequency of the selected
effect. Depending on the type of modulation
you select here, the parameter sliders below it
will change to provide the appropriate type of
modulation controls. If the Mod Amount is set
to 0%, no dynamic modulation is applied to the
audio signal. Then Effect Frequency slider then
becomes the primary control for modifying the
sound.
LFO Produces a low-frequency triangle wave as a
modulation source. The rate and amplitude of
the triangle wave are determined by the Mod
Rate and Mod Amount controls, respectively.
Envelope Follower Causes the selected effect to
dynamically track the input signal by varying
with the amplitude envelope of the audio sig-
nal. As the signal gets louder, more modulation
occurs. This can be used to produce a very good
automatic wah-wah-type effect. When you se-
lect the Envelope Follower, the Mod Amount
slider changes to a Mod Slewing control. Slew-
ing provides you with the ability to smooth out
extreme dynamic changes in your modulation
source. This provides a smoother, more contin-
uous modulation effect. The more slewing you
add, the more gradual the changes in modula-
tion will be.
Sample+Hold Periodically samples a random
pseudo-noise signal and applies it to the effect
frequency. Sample and hold modulation pro-
duces a characteristic random stair-step modula-
tion. The sampling rate and the amplitude are
determined by the Mod Rate and Mod Amount
controls, respectively.
Trigger+Hold Trigger and Hold modulation is
similar to Sample and Hold modulation, with
one significant difference: If the input signal
falls below the threshold set with the Mod
Threshold control, modulation will not occur.
This provides interesting rhythmic effects,
where modulation occurs primarily on signal
peaks. Modulation will occur in a periodic, yet
random way that varies directly with peaks in
the audio material. Think of this type of modu-
lation as having the best elements of both Sam-
ple and Hold and the Envelope Follower.
Mod Amount and Mod Rate
These two sliders control the amplitude and fre-
quency of the modulating signal. The modula-
tion amount ranges from 0% to 100%. The mod-
ulation rate, when LFO or Sample and Hold are
selected, ranges from 0.1 Hz to 20 Hz.
If you select Trigger and Hold as a modulation
type, the Mod Rate slider changes to a Mod
Threshold slider, which is adjustable from
–95 dB to 0 dB. It determines the level above
which modulation occurs with the Trigger and
Hold function.
Sci-Fi Keyboard Note Entry