Once upon a time we had "mixtapes" - a hand-made compilation of music (typically copyrighted songs taken from other sources - thank you Wikipedia) recorded in a specific order ... although with shuffle on an MP3 player these days, that's not always necessary. Before we did it though, they were typically compiled by DJs in the 70s and 80s who "mixed" and recorded them onto cassette tapes - hence the name. I'm going to go out on a limb here and say they had a less eclectic batch of songs - and possibly shorter - than on the mixtapes I currently have on my phone - which are running at 40, 41 and 55 tracks long. I don't play the songs right through - sometimes just listening to the first few seconds of a song reminds me of where it's from and why I like it ... most of them are "favourites" because they remind me of people or places or ... sometimes something else which I can't quite describe, just evokes a particular feeling ... a bit like visual art. There was one piece ... a painting ... I heard about recently where people would look at it - and start crying. It sounded to me like it had "E Flat" in it - and while that sounds a little out there, when you think that vision and hearing both relate to "waves", anything is possible! And who knew there was at least one book about such things - James Elkins' "Pictures and Tears: A History of People Who Have Cried in Front of Paintings". Of course, art, in its many forms, has been making people cry for about as long as it's been around - and the "why" is the subject of much speculation and discussion ... and seriously worth a bit more consideration. I remember someone saying once that an artist spends their life trying to create that perfect piece and then, if/when they do, trying to do it again. You have to think that part of that drive must be left in the piece ... perhaps it's that which strikes a chord in the rest of us.