RUB docs

Param sequencer

Per-step parameter lanes, Draw mode, Blend, lane tabs, and how panel knobs mix with sequence overrides.

Param Seq is RUB’s automation lane system: each pattern can hold several parameter sequences that write values step by step. Use it for filter moves, mix rides, Tune gestures, FX toggles — anything in the parameter catalog marked Lane = yes.

Enter Param view with Tab, the Param ear, or the Param tab on the homepage tour.

Pattern / Param switch
Pattern / Param ears — switch the sequencer between note grid and Param Seq lanes.

What a lane is

A lane is one ParamId on one pattern: 16 step values plus an “active” bit per step. Values use the same real units as the panel (see Parameters).

  • Written steps store a level
  • Unset steps hold the last written level (latch) — they are not “zero”
  • A lane can be disabled (muted) without deleting its data

Patterns with any installed lane count as occupied (glow) even if the note grid is empty.

Lane chrome

Picker and add

Lane picker
Lane picker — choose which parameter lane you are editing on this pattern.
Lane picker menu
Lane picker menu — jump between installed lanes or Add new.
Add lane
Add lane (+) — install another sequenceable parameter on this pattern (up to the lane limit).
Add-lane menu
Add-lane menu — pick a sequenceable parameter; already-installed lanes are disabled.
ControlRole
Lane pickerChoose which installed lane you are editing
+Add another sequenceable parameter (blocked when the pattern is full or the param is already present)

BPM and Lane Blend themselves are not lane targets (tempo / blend are song-level). Delay Sync is also excluded from lanes.

Tabs

Lane tabs
Lane tabs — switch lanes. Right-click a tab for Enable/Disable, Clear, or Remove.
Lane tab menu
Lane tab menu — Enable/Disable, Clear, or Remove this parameter lane.

Each installed lane gets a tab. Right-click a tab:

MenuEffect
Enable / DisableMute the lane while keeping values
ClearWipe all step writes on that lane
RemoveFree the slot entirely

Draw

Draw
Draw — click and drag across steps to paint levels in one stroke.

Toggle Draw, then click-drag across the bars to paint levels in one stroke. Turn Draw off to click individual steps or open the inline editor.

Step bars

Param steps
Param steps — click a bar to write a level; unset steps hold the last write. Draw mode paints by dragging.
ActionHow
Write a stepClick a bar (or drag in Draw mode)
Nudge level↑ / ↓ (Shift = ×10)
Clear stepDel / Backspace
Inline editDouble-click / edit readout where offered

Scale depends on the parameter:

  • Continuous knobs use their normal range
  • Mix reads as OSC A ↔ B
  • On/off and some bipolar params (e.g. Tune) use a mid-origin display

While playing, automatable panel knobs show the live lane overlay so you can see sequence vs panel at a glance.

Blend

Blend
Blend — crossfade panel settings with Param Seq overrides on the current pattern.

Blend (0…1, default full seq) crossfades:

  • PANEL (left) — respect faceplate / MIDI knob positions
  • SEQ (right) — lean on Param Seq writes

It appears when the current pattern has lanes. Right-click Blend to MIDI-map it. lane_blend is stored in the song JSON document.

Clipboard and patterns

In Param view, Cmd/Ctrl+C / X / V copy, cut, and paste lanes for the selected pattern (not notes). Pattern-menu Param section offers the same. Cmd/Ctrl+D still duplicates the whole pattern (notes + lanes) into the next empty slot.

Right-click a pattern LED for Transpose (notes), note clipboard, param clipboard, or Clear all.

Workflow tips

  1. Add Cutoff or Env Mod lanes first — filter motion is the classic Param Seq move.
  2. Keep Blend mid-way while designing so you can still grab the panel knob.
  3. Disable a lane to A/B a sequence without losing it.
  4. Dump the song with Song JSON if you want an AI to author lanes arrays for you.

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