User manual

5
a 6.3mm (1/4”) plug to the import jack

accepts very weak to very hot signals and
features high input impedance (10MOhms)
so that it sounds great with coil and piezo-
electric transducers. It offers a gain of up to
+60dB on the knob plus an optional boost of
+20dB set via jumper
21
   
2). Be aware that at high gain settings the

noises from other devices, switching power
supplies and transformers, as well as hum,
which is often caused by poor shielding of the
input cable.
The envelope follower in Sewastopol is a
unique circuit that offers both rapid reac-
tion to transients and smoothed response
       -

smoothing (which results in lags or unwant-
ed ripples in the output voltage), Sewastopol
makes use of a bipolar peak detector whose
output is held until a subsequent waveform
peak arrives. The response for a rapid in-
crease of amplitude (often associated with
transients) is nearly instantaneous. The
output value may be held for a longer time,
depending on the setting of the env release

decays to zero unless there is another peak
or some other component detected (like
noise, or hum, or even an inaudible DC off-
set). If such a component occurs, the follower
will continue updating its output CV as long

21

                    

4
3
2
1
0
-1
-2
-3
-4


envelope follower response
for long release range
V
ms
Long releaseModerate release
Short release
Audio signal