Looking for feedback on a feature I'm designing for my instrument

supervillain

Hi everyone. Right off the top, I'm not a musician, I was hired by a musician to code the instrument/sample pack he's putting together.

The feature I came up with works like this:

Imagine you are recording your song and your selected voice is Flute. But you want to incorporate piccolo to "talk back" if you will, to the flute. Ok, you record the flute, you record the piccolo, and mix it in your editor. But what if you could just switch voices on the fly? Flute plays a triplet, switches to piccolo which plays 2 bars, switches back to flute.

Is this something you could use? Is there already something out there which does this?

Any feedback would be appreciated. Thanks. :)