Melodyne Editor has poly ability...... however......

I have used it on poly stuff, a simple piano track. From my personal experience and opinion, there is still work to do on that technology. It's amazing and all that, and I have used it successfully, most often to remove a note or move it rather than to change it. Of course, the mono mode is totally freaking amazing in what it CAN do. Poly still needs some work, or maybe I need to spend more time working in poly to understand the process better to get decent results.

I have never used it to try to extract a solo and convert to midi. Some day I know that will be a possibility, just as BB can now, with relative ease and accuracy, determine the BPM, key and then determine the chords in a song. Maybe I should devote some time to experimenting...... what is spare time anyway... I've heard about it....?

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.