A Ducking Delay is used to suppress the delay signal while playing guitar. That means that the delay is only audible during breaks.
Take a free variable assign and choose:
* Target: Delay
* Target DL: Effects Level
* Target Min: 25 (which is the max.
A complete vocal channel strip with compressor & limiter, de-esser, equalizer, enhancer, delay, reverb, modulation fx, separate chorus and noise suppressor is part of Boss VF-1 algorithms.
I mean if you already own an unused Boss VF-1 then you can lend it to your singer. It cannot replace a "real" vocal channel strip.