I did some searches but couldn't find whether this had ever been discussed before.

I was using an oscilliscope to do some various EQ tuning in my car this past weekend, and as I programmed some presets was thinking "Wouldn't it be cool to be able to associate certain playlists or even certain songs to EQ presets?"

I like my EQ set pretty differently depending on whether I'm jamming alone, or talking with a passenger with music in the background. I like it set one way for hard rock and another for classical. It would be nice for the EQ to automatically switch.