Transform
Slew
Smooths CC transitions using exponential lag. The output follows the input but takes time to get there, creating portamento-like glides between values. Works on CCs only.
Parameters
SyncToggles between free time and tempo-synced slew rates.
Rate / DivisionIn free mode the time is displayed in ms or seconds. In sync mode the lag is set to anote value.
How It Works
Slew uses exponential smoothing. Each audio buffer, the output moves a fraction of the remaining distance toward the target value. This means it approaches quickly at first and slows as it gets closer — the same behaviour as an RC filter.
The rate knob controls the time constant — the time it takes to cover approximately 63% of the distance to the target. A time constant of 100ms means a noticeable lag; 2 seconds creates a very slow glide.
Notes
- •The first CC value received after a new session snaps immediately to the target rather than slewing from zero.
- •Slew can work well combined with an LFO — place Slew after LFO in the chain to smooth sharp waveforms. It's also great after CC->Note
- •In tempo-sync mode, the slew time updates when a new BPM is detected from the host transport.