Vca - Yamaha AN1x Owner's Manual

Fmod Depth
(Filter Modulation Depth)
The Filter Modulation Depth setting determines the
depth of the filter modulation of the VCF by the LFO1.
Filter Modulation adds a cyclical change to the filter
cutoff frequency to create a wah effect. Turning the
knob to the right widens the range of the cutoff
frequency change. Negative value settings reverse the
phase of the LFO1 by 180 degrees.
Settings: -64 ~ +63
Key Track
The Key Track setting determines the key tracking of the
VCF, raising or lowering the cutoff frequency point in
accordance with the notes played on the keyboard.
When Key Track is applied, the cutoff range shifts
accordingly at every note, with C3 as the base.
Turning the knob to the right (positive values) will cause
higher notes to have a higher cutoff point. Turning it to
the left (negative values) causes higher notes to have a
lower cutoff frequency. A value setting of "0" will apply
no key tracking.
Cutoff
Key Track+
+
Lower
Keyboard
–
C3
Key Track–
Cutoff
+
Lower
Keyboard
–
C3
Settings: -32 ~ +63

VCA

When KNOB PARAMETER GROUP switch [VCA] is
selected, the eight CONTROL knobs will access specific
Voltage Controlled Amplifier-related parameters.
The VCA is an amplifier used to increase the gain of the
input signal as received from the VCF, which is then
passed to the Effect block in the signal path. Available
parameters include level controls for feedback, volume and
keyboard velocity sensitivity, as well as depth control for
amplitude modulation.
The VCA can also be controlled by the attack time, decay
time, sustain level and release time of the AEG (Amplitude
Envelope Generator), to let you shape how the volume
level changes over time, from when a key is pressed, held,
then released, and subsequently how long it takes for the
sound to terminate.
Attack
The Attack setting determines the attack time of the
AEG, which is the time it takes for the signal to reach
its maximum volume level after a key is pressed (key
on). Turning the knob to the right produces a longer
Attack time.
Settings: 0 ~ 127
Decay
The Decay setting determines the decay time of the
Upper
Keyboard
AEG, which is the time it takes for the signal to reach
the sustain level from a maximum volume level while
the key is held. Turning the knob to the right produces
a longer Decay time.
Upper
Keyboard
Settings: 0 ~ 127
68
For more information about the VCA, see pages 11, 32.