Bitwig Preset Slow Gear
Envelope follower controlled volume, creates a ramp up attack. Based on the Boss Slow Gear fx guitar pedal from 1979. If the source is noisy use a noise gate right after its output to allow Slow Gear to return to zero (in order to track a new attack).
This is a companion discussion topic for the original entry at https://bitwiggers.com/presets/e1d5f47d-219e-4550-8342-e84e06baba6f/