What has replaced the mix tape in the modern world? Do you burn a CD? Share an Itunes playlist? I doubt that the basic urge to say it with music is dead. I've had the beginnings of a mix tape brewing in the back of my head for several days. I know I came to popular music late, but surely I'm not alone in this.
I was one of those people who made mix tapes for other people, too. I made at least one for Melissa, and copied others for her. I made one for oidhche, and another one after we broke up. turtle_morn and I made a tape for driving together, and I did several other driving mixes thereafter. And a lot of people have copies of the tape livianne and S made with the help of S's father's sound equipment. I'd really love to get that one on CD, but as it involved recordings of them singing, it's a little beyond my abilities. (And yes, ourika, I remember I promised to copy it for you.)
Come to think of it, perhaps it's not as basic an urge as I thought. I would imagine it would have been difficult to make a mix record. And only the very wealthy could pull off a live mix performance. On the other hand, do you think that may have been the reason for nobles to hire court bards?