As somebody who enjoys listening to beatmatched DJ mixes, I'm glad I don't have "perfect" pitch. I'd hate to have vast amounts of music sound "wrong" just because the speed and pitch was changed slightly to synchronize it with other tracks. Relative pitch is very important for musicians, but absolute pitch is mostly useless. The only use I can think of is singing songs with a cappella intros, so you're in tune with t…
Pitch and speed are inherently linked when you are dealing with physical vinyl, but time-stretching in software isn't too complicated.