Control Characteristics - Xaoc Devices TALLIN Operator's Manual

control
characteristics
nential envelope, it's a good idea to use this
input, because it will result in signal amplitude
that follows the envelope, decaying towards
zero with a natural exponential tail. Envelopes
with amplitude different from 8V can be easily
used here, requiring only a small adjustment of
the knob to compensate.
OVERDRIVE OPERATION
The overdrive circuit in Tallin offers two distinc-
tive distortion characteristics switchable via the
drive toggles. The symmetric position acti-
vates a bi-polar parabolic distortion curve that
equally amplifies and squashes both peaks of the
waveform (fig. 5), yielding a spectrum dominat-
20
Gain [dB]
10
0
-10
-20
-30
-40
-50
-60
-70
-80
MIN 1 2 3 4
10
Gain [dB]
0
fig. 3 fig. 3
-10
gain vs exponential gain vs exponential
-20 control voltage control voltage
with linear control with linear control
-30 voltage at 8v voltage at 8v
-40
-50
-60
-70
-80
-90
0 1 2 3 4
fig. 2 fig. 2
gain vs volume knob gain vs volume knob
position with position with
exponential cv exponential cv
and linear cv at 8v and linear cv at 8v
Volume knob position
5 BOOST 7 8 9 MAX
Exponential control voltage [V]
5 6 7 8 9
ed by 3rd order harmonic overtone. The result-
ing slightly brightened sound is modeled after
an overdriven push-pull power amplifier. The
asymmetric position of the switch activates
a distortion curve that is more concave in one
direction while it is convex in the opposite di-
rection (fig. 5), yielding a spectrum dominated
by 2nd order harmonic overtone. The resulting
mellow and warm sound is modeled after a
classic single-ended tube amplifier.
ACCESSORY
Our Coal Mine black panels are available for
all of Xaoc Devices modules. Sold separately.
Ask your favourite retailer. •
140
Gain [%]
120
fig. 4 fig. 4
100
gain vs linear control gain vs linear control
voltage with centered voltage with centered
80
volume knob volume knob
position position
60
40
20
0
0 1 2
Output signal [V]
8
4
0
fig. 5 fig. 5
-4
two types two types
of overdrive of overdrive
applied applied
-8
to a sine to a sine
10 0 2
5
expo cv =
expo cv =
expo cv =
Linear control voltage [V]
3 4 5 6 7
ASYM
4 6
8V
7V
6.5V
8 9 10
SYM
Time [ms]
8 10