This site is dedicated to everyone interested in Serge Modular Music Synthesizers
|THE SERGE MODULES - Applications and Comments|
Let's face it; VCAs
are pretty unglamorous. All they do is make it quieter, on
command. And there's many ways to do it wrong; too much c/v
transfer to audio, too noisy, not enough dynamic range. The Serge
VCAs at first blush look pretty plain but are in fact very well done
A funky feature of Serge envelope generators and transient generators is that they're capable of linear, log, and exponential curves. So if you have a linear response VCA you want to use to gate audio, just supply it with an exponential curved envelope! Likewise, if you want to vary vibrato depth through an exponential response VCA, supply it with a log envelope.
The Serge audio VCAs have a graduated response. Below .5 volts, they want to attenuate completely, keeping noise minimized. Turn the gain knob to 12 o'clock, you've got a standard VCA. Past 12 o'clock, the gain is sufficient that you will start to hear your signal without additional control voltage. The catalog says they won't overdrive past a gain factor of two if you pump lots of control voltage into the input.
Some words about panning and crossfading: If you simply have two VCAs connected together such that varying the control voltage brings the gain on one up and the other one down, you have a rudimentary panner, but the panner has a problem. At dead center (both VCAs equal), the loudness will be less than full right or full left. You need some flattening of the response curve to make this complete. The Serge VCAs provide this equalized left-center-right response curve, so panning sounds fairly natural.
Simple, quiet, clean,
to the point. 'Aux In' inputs let you chain mixers together, or
allow another unity-gain input from another source.
As with the Dual Processor, you can use this module to realize greater
than unity gain. Plug your incoming audio into one input, then
multiple that banana plug into the next input. You can also get
some subtle signal distortion this way.
of the dual mixer. Nice efficient skinny package if you're short
At first glance,
it looks a lot like the UAP. But what we have here is a module that
has two independent VCA's driving two channels. Each VCA has its own
panner to the two channel output. Unlike the UAP, this module
does not crossfade.
Pro: Ideal small-system VCA, two VCAs really, cross-connected to provide panning, crossfading, or two independent VCAs Nice compact arrangement. This is an 'interface' module also in that its two output channels have both the banana jacks and 1/4" jacks (you can ask for minis or other jacks instead I think).
Wizardry: Be careful setting this one up! The Serge VCAs have very wide dynamic range. If you have your power amp cranked too high you may destroy your speakers and your eardrums. Since it's got the all-important 1/4" jacks, sometimes this module gets used for nothing more than interfacing. Turning the gain up past 12 noon gives you unity gain through a few dB's of gain, so you can treat it as a master volume/pan/interface in addition to being a regular VCA. The AM inputs are ac coupled and nice for tremolo or ring-modulator type sideband effects.
Matrix Mixer (MAX)
Quad Input Voltage Controlled Stereo Mixer (QVM)
Multi Channel Stereo Mixer (SMX)
Multi Channel Quadraphonic Mixer (QMX)
|Control Voltage & Trigger Sources & Modifiers|
|Red, Blue, and Gold|