is an active module. Each half of the 4 dual slide pots is normalized to a DV voltage, internally selectable
to either 0V-5V or 0V-10V ranges (approximately). The module can pass both AC and DC signals with output levels
proportional to the position of the sliders. The Jacks and slide pots are mounted to a 26 HP rotatable panel. The
panel graphics are so that the panel can be rotated to choose if the jacks are to the left or to the right of the slider
themselves, thus keeping the patch cables out of the way.
There are typically FOUR main ways to use the SP-4DP
module. Each of the four slide pots in the SP-4DP
are dual slide pots whose halves are electronically separate from each other, so each slider can do any TWO of these functions at the same time, to two different signal paths - eight signals can be controlled at once. The first type of function is to alternately send one signal (audio or CV) to two different destinations - this is called a Pan-pot
function. The second type is to fade between two sources (audio or CV), sending the “mix” to one destination - this is a Segue
function. The third type is to control the level of one signal (audio or CV) passing through the SP-4DP
- This is an Attenuation
function. The forth type is to generate DC control voltages and output them - the DC control voltage
The jack are marked with arrows to denote the end of the slider that is "active" when the slider is moved to that end. The double headed arrow is the slider itself. So for example, if you were to put LFO-A into the up arrow jack, and LFO-B into the down arrow jack, the output from the double arrow jack would fade from LFO-A when closer to the up arrow side, and fade into LFO-B closer to the down arrow end. The reverse is true too. If you put a signal into the double arrow jack, it will get louder in the up arrow output when the slider is closer to it, and visa versa. The SP-4DP
uses 100K dual linear sliders so if signals are very high, full attenuation may not happen is these modes. If you want to fully attenuate a sound, plug it into the end marked with the "+" sign (defeating the normalization to the +V) and read it from the double arrow jack. The opposite end of the fader from the "+" is normalized to ground, so this will assure full attenuation.
The CV-out mode with the SP-4DP
by itself uses the normalization of the "+" inputs. You plug the destination into the double arrow jack and as you get closer to the jack with the "+" sign, the voltage will increase. Each dual slider's halves are wired opposite so one slider will output a increasing CV at the same time other is outputting a decreasing one.
As stated above, each hals of the slider can be connected with different functions at the same time and share the same control. You can have a DC voltage on one side, and a fade between LFOs on the other for instance. Any combo of the different modes.
The unit is not bipolar as is, but of course if you have a source of -V and +V, they can be patch into the jacks. The unit doesn't care if the signals are bi-polar or uni-polar, DC or audio. It is basically four dual pots with all 6 taps wired to jacks and configured as a voltage divider with a normalized DC voltage. It can be run as a purely passive unit too, just by not connecting it to the power bus. It also can output -V by just plugging the 10 pin end of the power connector in backwards.
Here is a link to the two owners manuals -
Manual for the assembled unit.
Manual for the Kit version