SEWASTOPOL audio port & voltage extractor ii operator’s manual rev. 1948/2.
module explained SALUT symmetrizer A , import preamplifier B , envelope follower C , and voltage comparator D . These blocks may be used separately, but they are internally normalled thus offering a default chain for processing your modular signals through outboard gear (effects, stompboxes, signal processors), and then bringing them back to modular levels and offering several analysis options. Sewastopol facilitates using your modular system as a complex effect machine for your external gear.
front panel overview 10 12 fig.
USING THE MODULE ter affects the operation of the follower only, while the signal delivered to the imported remains full-band. To process modular signals through your outboard gear, arrange an external chain of desired processors to be included in your patch and connect it between the fx send and fx return (fig. 6). Remember that modular signals are way too hot for some studio gear (which can eventually cause damage), so attenuation is important.
+20dB set via jumper 21 on the back (fig. 2). Be aware that at high gain settings the preamplifier may be sensitive to all kinds of noises from other devices, switching power supplies and transformers, as well as hum, which is often caused by poor shielding of the input cable. 21 The envelope follower in Sewastopol is a unique circuit that offers both rapid reaction to transients and smoothed response to amplitude fluctuations (fig. 3, 4).
5 V 4 Normal threshold 3 fig. 5 Comparator input (e.g. an envelope) hysteresis Hysteresis width 2 1 0 output of a normal comparator output of a comparator with hysteresis ms 0 10 20 30 40 50 60 70 80 90 100 A proper setting of the release time is crucial for obtaining a musically useful CV signal that is not too rough and not too sloppy. The knob and range switch offer a wide range of settings suitable for extremely short and dry transients as well as long tails of reverbs.
signal flow diagram fig.
main features WARRANTY TERMS XAOC DEVICES WARRANTS THIS PRODUCT TO BE FREE OF DEFECTS IN MATERIALS OR WORKMANSHIP, AND TO CONFORM WITH THE SPECIFICATIONS AT THE TIME OF SHIPMENT FOR A PERIOD OF ONE YEAR FROM THE DATE OF PURCHASE. DURING THAT PERIOD ANY MALFUNCTIONING OR DAMAGED UNITS WILL BE REPAIRED, SERVICED, AND CALIBRATED ON A RETURN-TO-FACTORY BASIS.
