you can just do this normally with #send
Wet/dry Control On Effects
Dooferwet/dry
Sample DSP chain wet/dry
Dry/wet Slider On Compressor
Wet/dry For Ladspa
Dry/Wet for Sends
Simple doofer addition: dry-wet- / amount - slider
Vst Effect Dry/wet Mix
We Need A Native Dry/Wet Device
Standard dry/wet mix control on all DSP?/
Tool Idea -Dry/wet Metadevice