This sounds very cool! Also very expensive.. which makes sense, it's mechanically complex product (variable-pitch propeller) with strict requirements (don't wa

This sounds very cool! Also very expensive.. which makes sense, it's mechanically complex product (variable-pitch propeller) with strict requirements (don't want things to rattle or while) which is marketed to rich people (hi-fi fans). I wonder if modern power electronics and brushless motors can achieve the same effect with a fixed-pitch propellers. This could be much cheaper and more accessible to hobbyist.