This card adds spatial dimension, modulation, and temporal dynamics to your bubble sounds.
Spatial Effects
| Knob | What It Does |
|---|
| Topology | Foam topology simulation — models how bubbles interact in a foam structure, including merging and rearrangement events. |
| Stereo Width | Stereo spread of the bubble field. At 0, everything is mono-centered. At 100%, bubbles are distributed across the full stereo field. |
| Mirror Depth | Simulates acoustic reflection from a water surface. Creates comb-filtering and depth perception. |
Topology enables experimental foam physics simulation including coarsening dynamics and structural rearrangement events. While it creates interesting evolving textures, it can be CPU-intensive at high values. For most situations, leaving Topology at 0% is recommended.
Motion Modulation
| Knob | What It Does |
|---|
| Chaos | Randomizes unlocked parameters. Has two modes — see below. Right-click any knob to lock it from Chaos modulation. |
| Drift | Slow Brownian-walk modulation over 30-120 seconds. Parameters gradually wander with velocity-smoothed random walks, creating evolving textures without sudden changes. |
| Scatter | Per-voice random variation. Each simultaneous bubble gets slightly different parameter values (surface tension, viscosity, decay, radius), creating natural ensemble variation. |
Chaos Modes (Jump vs LFO)
Right-click the Chaos knob to toggle between two modes:
| Mode | Behavior |
|---|
| Jump (default) | On every MIDI note-on, randomizes unlocked parameters by Chaos amount. Discrete jumps tied to playing. |
| LFO | Continuous multi-rate LFO modulation of unlocked parameters. The label changes to “Chaos LFO” when active. Each parameter wobbles at its own slow rate, creating constantly evolving textures even on sustained notes. |
In LFO mode, the modulation runs whether you’re playing or not — useful for ambient pads. In Jump mode, parameters only change at note-on events — useful for percussive variation.
Surge Modulator
Surge provides physics-based temporal envelopes that trigger on note-on, creating evolving foam events.
| Control | What It Does |
|---|
| Surge Mode | Selects the envelope shape |
| Time | Total envelope duration (1-30 seconds) |
| Depth | How much the envelope modulates parameters (0-100%) |
Surge Modes
| Mode | Character |
|---|
| Off | No temporal modulation |
| Wave | Smooth sine-like swells |
| Pummel | Aggressive attack, rhythmic pumping |
| Roil | Turbulent, chaotic modulation |
| Gush | Building intensity, like water surging |
| Burst | Sharp attack, gradual decay |
Surge modulates Rate among other parameters. If Rate is already at maximum, Surge has nowhere to push it higher. Set Rate to 30-50% so Surge can modulate in both directions for the full dynamic range of foam events.
