Seems the built in parametric optimizers are the next big thing in a/v receivers. Yamaha's YPAO is the most widely available right now, and I'm sure other brands will put forth their best efforts in their affordable receivers shortly as well. I'm not sure I understand EVERYTHING they do. What makes them a desireable feature?
Other than maybe finding the optimal frequency to match a subwoofer to its main speakers, what does YPAO and other parametric optimizers do that the average user couldn't? Speaker output level, delay, etc...Most people probably have a good grasp on these already, or just don't care. Is there someting else? Thanks.