User guide

8 XONE VF-1 User Guide
Front Panel Controls
Envelope Follower
The envelope follower modulates the filter cut-off frequency in
direct proportion to the intensity of the input signal. For example,
with low-pass filter selected and set to a low 20Hz, turning up the
envelope follower will produce a dynamic effect as the filter cut-off
frequency rises and falls along with the loudness of the music.
Envelope Follower Decay
Sets the decay speed of the envelope follower, either slow or fast.
This changes the sound of the effect according to the type of
music played.
Valve Overdrive
Turn this up to increase the amount of signal passing through the
valve (tube) stage. This increases the second harmonic distortion
and valve compression effect created which produces a pleasing
‘fattening’ of the sound. At minimum the signal is low enough to
ensure that the valve is operated in its linear region with little
effect. Continuing to increase the level of overdrive will first cause
the valve to “soft clip”, ideal for music sources, and then bring in
“hard clip” circuitry making the effect much more pronounced,
better suited to changing the character of instrument sounds such
as a bass line. The control includes a ‘make-up gain’ element
which controls the ratio between input and output level so that the
volume does not seem to increase too much as the overdrive, and
therefore distortion/compression effect, is increased.
3
2
1
2
4
3
10
139
11
12
87
5
6
1
ANALOGUE STEREO FILTER
OFF
ON
ENV-FOLL TO OVERDRIVE
100
3
2
1
6
5
4
9
8
7
100
3
2
1
6
5
4
9
8
7
0
1
2
3
4
5
6
7
8
9
10
with Valve Overdrive
24dB/Octave mono
FAST
SLOW
DECAY WAVEFORM
FILTER ON
20kHz20Hz
VCF FREQUENCYHI-PASS BAND-PASS LOW-PASSRESONANCE
0
1
2
3
4
5
6
7
8
9
10
LFO DEPTH
0.8
4Hz
8
LFO
0.2
16
VALVE OVERDRIVEENVELOPE FOLLOWER
12dB/Octave stereo