One modulator, many targets

A mapping is one modulator driving one parameter through a range. A modulator can drive up to twelve parameters, each with its own amount and polarity.

Make a mapping

1. Click Map on the slot. The parameter browser opens, grouped by track and then by plugin. The track you are on sits at the top; every other track is under Other tracks. Parameters you have already mapped are ticked.
2. Choose a parameter. It joins the slot’s target list. Repeat for as many as you need.
3. Set the range under the cog. Drag the Lo and Hi handles. Putting Lo above Hi inverts the mapping, which is how you get ducking from a follower.

Note

Kerf Modulators works with any plugin REAPER hosts on the track, whatever its format: VST, VST3, CLAP, AU or JSFX. It drives the parameters REAPER exposes. If a plugin does not expose a parameter to REAPER, it cannot be mapped.

Working across tracks

A mapping remembers its target track even when you reorder, rename or reload. Point a modulator on one track at a plugin on another and it carries on working: open the Map menu and look under Other tracks.

When an Envelope Follower listens to a different track, Kerf Modulators adds the send it needs for you, set to audio only. Remove the mapping and the send goes with it.

Chaining modulators

Map any modulator to a Macro knob instead of a plugin parameter and everything that knob drives follows. An LFO moving a macro that controls four filter cutoffs is one mapping doing the work of four. A macro cannot drive another macro, so a chain can never loop back on itself.

Projects

Every track’s modulators, curves and maps go into the .RPP project file and come back when you open it. If you ever uninstall Kerf Modulators, the project still opens as normal; the modulation settings stay in the file and return if you reinstall.