Qu-Bit — Synapse
Qu-Bit Synapse Manual PDF
Qu-Bit Synapse Cheat Sheet
A powerful crossfade switch with digital routing/mixing, memory presets, DC modulation, LFOs, and flexible CV control for Eurorack.
Controls Reference
Knobs & Encoders
| Name |
Function |
| Crossfade (4x) |
Set blend between A and B inputs per channel. CV controllable (-5V to +5V). |
| Terminal Encoder |
Shifts channel outputs to different output jacks (routing). Press to reset positions. CV controllable (-5V to +5V). |
| Memory Knob |
Selects memory bank (8 total); load preset crossfade positions. Bypass memory fully CCW. Also sets LFO phase relationship and DC offset in edit modes. |
| Inertia Knob |
Sets slew/smooth (0–5s), affects fader, memory, and CV changes. Also controls LFO frequency in edit mode. Also enables click-less switching in edit mode. |
Buttons
| Name |
Function |
| Save |
Store current crossfade/routing to memory bank. |
| Scatter |
Shuffle output channel positions. |
| Advance |
Move all outputs one to the right (sequential switch). |
Inputs & Outputs
Inputs
| Jack |
Type |
Voltage Range |
Description |
| A (4x) |
Signal In |
Audio/CV (DC) |
Main per-channel input |
| B (4x) |
Signal In |
Audio/CV (DC) |
Alternate per-channel input, can be normalled to +5V offset |
| Crossfade (4x) |
CV In |
-5V to +5V |
Crossfader per channel; adds to knob position |
| Terminal |
CV In |
-5V to +5V |
Shifts output routing |
| Advance |
Trigger/Gate |
N/A |
Steps all outputs one to the right |
| Scatter |
Trigger/Gate |
N/A |
Randomizes output routes |
Outputs
| Jack |
Type |
Description |
| Out (1–4) |
Audio/CV Out |
Final output of each switch channel post crossfade and routing |
| 1+2 |
Sum Out |
Sum of output from Out 1 and Out 2 |
| 3+4 |
Sum Out |
Sum of output from Out 3 and Out 4 |
| Sum |
Sum Out |
Pre-switch sum of each crossfade channel output |
Special/Shift Functions (Hold + Action)
| Hold... |
While Turning... |
Action |
| Terminal |
Crossfade knob |
Per-channel master volume |
| Terminal |
Memory knob |
+5V DC offset to B inputs (center point on/off) |
| Terminal |
Inertia knob |
Click-less switching on/off |
| Terminal |
Scatter button |
Set linear/constant loudness fade curve |
| Terminal |
Save button |
Factory reset |
| Save |
Scatter button |
Randomize memory positions |
| Save |
Terminal button |
Reset all memory to A only |
| Scatter |
Crossfade knob |
Set LFO amplitude per channel |
| Scatter |
Memory knob |
Set LFO phase relationships |
| Scatter |
Inertia knob |
Set LFO frequency |
| Scatter |
Terminal button |
Reset LFOs to default |
| Scatter |
Save button |
Randomize internal modulation (LFOs) |
LEDs will indicate status for certain functions.
Voltage Control Summary
- All CV Inputs: Range
-5V to +5V
- Crossfade: CV adds/subtracts from knob position
- Terminal: CV positive = right, negative = left output shift
Quick Operation Examples
- Crossfade between A/B: Turn crossfade knob per channel, or patch CV.
- Sequencer Mode: Enable +5V DC offset to B inputs; modulate crossfade with CVs.
- Switch outputs: Turn Terminal knob or use Terminal CV input.
- Shuffle/Advance routing: Use Scatter or Advance buttons/inputs.
- Save/Recall Scene: Set crossfades/routing, select memory slot, press Save.
- LFO Modulation: Hold Scatter, turn crossfade knob for per-channel LFO amount; adjust inertia for speed.
For more advanced usage, see Qu-Bit Synapse Manual PDF.
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