The new Serge preamps and envelope detectors provide an exceptionally responsive link between external audio signals and the Serge synthesizer modules. The key to this responsivity comes from the fact that our detector was designed to respond to the POWER rather than to the AMPLITUDE of a sound. No other synthesizer system offers this sophisticated capability. Human perception of loudness is proportional to the POWER content of a wave, rather than to its AMPLITUDE. Detecting the AMPLITUDE of a signal produces an inaccurate envelope, sometimes too soft, and most of the time too loud. The new Serge detectors are exceptionally accurate, responsive devices which output a control voltage envelope that is directly proportional to the perceived loudness of an input signal. It operates over a very wide dynamic range, in excess of 70 db (or the difference between a whisper and a subway train at 15 feet!). The output is accurately log-linear at 12.5 dB per volt, a taper which mates perfectly with the control characteristics of our newest VCAs. Thus it is possible, for example, to control the loudness of a synthesizer sound by the sound envelope of a locomotive, a dog barking, or a voice going from a whisper to a shout. The effect is especially remarkable [since] because of the accuracy of the responses, the whisper is really a whisper, and the shout a shout.
The PREAMP DETECTOR (PRNV) allies a Serge detector with a multi-purpose preamp suitable for a wide variety of inputs. The LO-Z input accepts high output microphones in the 200 to 1000 Ohms range (such as most electret microphones), with a sensitivity suited for close-miking applications such as instrument or voice pickup. The HI-Z input accepts transducers such as guitar pick-ups and contact microphones. It is also suited for amplifying low level signals from tape machines, tuners, etc. Detector and Preamp can be switched to work separately or coupled. Sensitivity for the various microphones and audio sources can be adjusted over a very wide range using the Preamp's gain control. Please note that it will not cut the gain to zero. With the Dual Comparator Module, exceeding a pre-set loudness level can be used to provide a trigger pulse to initiate any number of activities within the synthesizer.
The ENVELOPE DETECTOR (ENV) and the DUAL DETECTOR (ENV2) are stand-alone versions. Both of these modules, include LED displays, and jacks for internal or external inputs. Recommended modules for placement close-by on a Panel are the Dual Slope Generators (to provide variable attack and decay slopes) and, also, the Dual Comparator module. With the Comparator, exceeding a pre-set loudness level can be used to provide a trigger pulse to initiate any number of activities within the synthesizer.
The ENVELOPE DETECTOR (ENV) and the DUAL DETECTOR (ENV2) are stand-alone versions. Both of these modules, include LED displays, and jacks for internal or external inputs. Recommended modules for placement close-by on a Panel are the Dual Slope Generators (to provide variable attack and decay slopes) and, also, the Dual Comparator module. With the Comparator, exceeding a pre-set loudness level can be used to provide a trigger pulse to initiate any number of activities within the synthesizer.
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