This segment from a Bitwig Studio introduction walkthrough demonstrates how Bitwig's native modulator system works in practice, using an organ patch as the starting point. The presenter shows how synthesizers in Bitwig are deliberately lean on built-in modulation, because modulators live outside the instrument and can be added freely to any device.
By clicking the assignment button, every modulatable parameter on the instrument lights up, making it immediately clear what can be controlled. From there, an envelope gets mapped to a drawbar to create a percussive swell on each note, and a tempo-synced beat LFO gets routed to a second drawbar moving in the opposite direction.
The bit also covers a less obvious workflow: modulating downstream effects. A comb filter added after the instrument can't be modulated directly until it's dragged into the instrument's included effects chain, at which point it becomes part of the same modulation scope. That distinction between external and embedded effects is easy to miss and worth understanding early.
The same modulation system applies to third-party VSTs, not just Bitwig's own devices. Any plugin loaded into a Bitwig instrument or effects chain slot becomes available for modulation in exactly the same way.