Slew and CC smoothing
CC slew interpolates outgoing controller values between successive arp steps so a moving filter cutoff or resonance glides instead of stepping. The slew view offers three modes: off, eight manual glide times, and an auto mode that stretches the glide to reach the next CC target, so sparse arps glide longer and dense arps snap tighter.
A second, smaller smoother sits on LaunchControl fader and knob input before it reaches a sequencer parameter. It is not user-configurable.
Slew view
LP layout
While the slew view is active, both Launchpads display the same 8×8 picture:
- LHS LP (both players): sequencers 1–8, one column per sequencer. Only the sequencers that carry CC arps have a slew column: 2, 3 and 6. Columns 1, 4, 5, 7 and 8 stay dark.
- RHS LP (both players): sequencers 9–16, and again only the CC-carrying ones: 9, 11 and 12, which are RHS columns 1, 3 and 4. Column 2 (sequencer 10) and columns 5–8 (sequencers 13–16) stay dark.
A column is live for sequencers 2, 3, 6, 9, 11 and 12, the same set that owns a CC-arp view. There is nothing for slew to smooth on the others, so they render dark and ignore presses.
Each live column represents one sequencer. The column shows one of three modes:
- Off: row 1 slate grey, rows 2–8 dark.
- Manual level N: rows 1 to N lit in that sequencer’s own colour, the rest dark, so the column reads as a bar whose height is the glide time.
- Auto mode: row 1 in the sequencer’s own colour, row 8 purple, the rows between dark. Auto follows the trig pattern (see Behaviour below).
Edit gestures
Slew is edited by pressing a column/row cell on either LP. Both players can edit and the surface is shared, but each player’s modifiers are their own, so a shift+mute on one LC does not affect the other.
| Current tau | Press | Result |
|---|---|---|
| 0 | Row 1 | tau = 1 (turn on at level 1) |
| 1 | Row 1 | tau = 0 (turn off) |
| 2..9 | Row 1 | tau = 1 (change to level 1; exits auto) |
| N | Row N (2..7) | no-op (idempotent) |
| Other than N | Row N (2..7) | tau = N |
| 0 | Row 8 | tau = 8 (turn on at level 8) |
| 8 | Row 8 | tau = 9 (enter auto) |
| 9 | Row 8 | tau = 8 (exit auto → manual 8) |
| 1..7 | Row 8 | tau = 8 |
| any | SHIFT + MUTE (player’s own LC), any row | tau = 0 (column reset) |
| any | Any column outside {2, 3, 6, 9, 11, 12} |
ignored |
There is no single “off” cell that always disables slew. To turn off without shift-mute: press row 1 once (lands at tau=1), then press row 1 again (tau=0). SHIFT + MUTE is the one-press panic reset.
Behaviour
Off sends each CC value the moment the step fires, so the parameter jumps.
Manual levels 1 to 8 glide over a fixed time, from about 20 ms at level 1 to about two seconds at level 8, doubling roughly every level. The whole sequencer uses the same time, so every CC row on it moves together.
Auto sets the glide from the pattern instead. Each row looks ahead to its own next CC target and takes exactly that long to get there, so a row with a target every step snaps, and a row with one target per bar glides across the whole bar. Rows on the same sequencer can end up sounding quite different, and that is the point: a busy filter-cutoff row and a sparse delay-time row each get the glide that suits them. Because the glide is measured in steps, it follows the tempo and the sequencer’s clock division.
A changed glide time takes effect on that row’s next step rather than immediately, which is not something you will hear at any sensible tempo. A glide already in progress finishes with the setting it started on.
LC 1-pole filter
This one is not a view at all. It is a smoother that sits on every LaunchControl knob, all three rows of them, taking the jitter out of the knob’s own output so a slow turn does not produce a staircase. The knob’s 0-127 travel is quantised to the eight values the rest of the instrument works in, and a fast sweep arrives as one clean transition per value rather than a burst.
There is no LP gesture for this filter. It exists so that sweeping a knob across several values in one motion sends the engine one clean transition per value rather than a burst of intermediate ones.
Cross-references
- CC arps: the CC arp views that produce the targets slew smooths between.
- Clock and timing: step duration, which is what auto slew counts its glide in.
- Selecting sequencers and views: how to reach view 8.2 (the slew view) on any sequencer.