@davintxi I was looking into Jobys air taxi recently and the work NASA and them have been doing to reduce the noise on these aircraft when you have a ton of props. So theres this thing called a synchrophaser thats in use on turboprop aircraft that matches propeller speed and phase. It helps reduce beat frequencies and reduce aircraft sound and vibrations. They want to do something similar with Joby but they also have an algorithm that will vary the RPM on each motor so that each propeller is producing a different frequency so the total frequency spectrum sounds closer to white noise. Idk I think its kinda interesting