Synthetic Sound Labs Segwencer IV Model1520

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Full description here: http://steamsynth.com/m_SegwencerIV.aspx"

"The SSL Segwencer IV™ module is indeed in a class of its own. The name derives from the audio term “segue” (fading from one sound to another), and the synth term “sequence” (moving from one point / sound to another), and once combined, there is a synergy that blasts these concepts into a totally new way of morphing sounds, textures and even control voltages.

Before we go any further, a bit of explanation is probably in order. If you know a bit about pipe organ history, you know that a "crescendo" pedal is not a simple volume control. Pipe organs can control volume by opening and closing louvers in front of the pipes (called “swell”), but can’t really control brightness / timbre. A crescendo can add the perception of brightness and impact by adding more “ranks”. This is typically done with a separate pedal that the artist moves forward to bring in brighter and louder sounds. On a pipe organ, the mechanics of this are fairly straight-forward but technically complex. As the artist goes from soft to loud with the crescendo pedal, several “switches” are sequentially engaged. Each successive switch causes a new pipe rank to sound, therefore it becomes increasingly fuller with each stage of the crescendo pedal.

So, what is the SSL Segwencer? In a typical Voltage Controlled studio environment, a control voltage is fed to the “Depth” input which (through an on-board attenuator) controls which of the four Segwencer channels is active based on the input voltage. Each channel of the Segwencer has a separate built in VCA (DC coupled!) input and output, as well as a comvenient Mix output that can frequently save a mixer..."