Four-stage touch-controlled voltage source. Each stage has three tuned voltages (X/Y/Z) and a pressure-sensitive copper touchplate that fires a gate and outputs pressure CV. Up to four units chain into an 8- or 16-stage controller.
Patch Ideas · 7
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Behaviors
Touching a plate selects that stage. The X/Y/Z common outputs switch to display that stage's tuned voltages. Functions as an analog sequencer played by hand.
Pressure output amplitude scales with flesh-to-copper contact area. Light fingertip tap produces a low CV; flat-finger press with force produces maximum. Per-stage outs are independent; CH 4 pressure is also a mix bus.
With nothing patched to CH 4 Gate, the jack carries a logical OR of all four stage gates. Stacking any gate output to a single gate input also sums gates.
Top row voltage range reaches +8V — high enough to trigger most gate inputs. Setting a stage's X knob full CW and another full CCW turns the stage selection into a toggled gate at the X output.
Up to four Pressure Points units chain into 8- or 16-stage controllers via rear headers. Master unit keeps Close 4 Master jumpers closed; slaves open them. Gate and Pressure busses extend across the entire chain.
BRAINS adds clock/reset/address CV inputs, turning the touchplates into a clockable 4- or 8-step sequencer. Maximum is two Pressure Points per BRAINS. Jumper on BRAINS selects 1PP or 2PP mode.
Touchplate sensitivity varies with skin moisture, finger size, and orientation. Adjust internal trimmer CW to compensate for dry fingers or vertical racks; CCW for greater pressure-CV resolution at the cost of fast sliding between plates.
Controls
| Per stage (4 knobs) | Tuned Voltage Row X | Top row of knobs. Sets Tuned Voltage X for each stage. Range extends higher than the other two rows, useful as a settable gate source. 0 to +8V |
| Per stage (4 knobs) | Tuned Voltage Row Y | Middle row of knobs. Sets Tuned Voltage Y for each stage. Typical range for 1V/oct pitch when calibrated. 0 to +5.5V |
| Per stage (4 knobs) | Tuned Voltage Row Z | Bottom row of knobs. Sets Tuned Voltage Z for each stage. 0 to +5.5V |
| Per stage | Touch Plate 1–4 | Copper finger-plates. Touching selects the Active Stage and generates gate plus pressure CV. Requires clean bare hands — the finger closes the circuit. Resistive touch · dry/clean skin required |
| Global (internal) | Digit Trimmer | Internal trimmer pot for touchplate sensitivity. Accessed from the right side of the PCB with power off. More CW increases sensitivity for dry/small fingers or vertical installations. Default: 40% CW · adjust with power OFF |
| Global (rear) | Close 4 Master / EXPAND jumpers | Rear headers configuring whether the unit is Master (rightmost in chain) or slave. Master has Close 4 Master closed; chained slaves leave them open. EXPAND headers also jumper for standalone use. Master = closed · Chained slaves = open |
I/O
OUT · 11
- Tuned Voltage Out X 0 to +8VUnified output carrying the X voltage of whichever stage is currently Active.
- Tuned Voltage Out Y 0 to +5.5VUnified output carrying the Y voltage of whichever stage is currently Active.
- Tuned Voltage Out Z 0 to +5.5VUnified output carrying the Z voltage of whichever stage is currently Active.
- CH 1 Pressure Output 0 to ~5V CVPressure CV from stage 1. Amplitude proportional to finger contact area and force.
- CH 1 Gate Output gate GATEGate output for stage 1 while touchplate 1 is held.
- CH 2 Pressure Output 0 to ~5V CVPressure CV from stage 2.
- CH 2 Gate Output gate GATEGate output for stage 2 while touchplate 2 is held.
- CH 3 Pressure Output 0 to ~5V CVPressure CV from stage 3.
- CH 3 Gate Output gate GATEGate output for stage 3 while touchplate 3 is held.
- CH 4 Pressure Out / Combined Pressure 0 to ~5V CVPressure CV from stage 4. Normalized to the Combined Pressure BUS — when nothing else is patched into CH 4, this jack emits a mix of all four pressure signals.NORM → Combined Pressure BUS of all 4 stages
- CH 4 Gate Out / Combined Gate gate GATEGate output for stage 4. Normalized to the Combined Gate BUS — when nothing is patched, this jack emits a gate whenever any stage is touched.NORM → Combined Gate BUS of all 4 stages