On my iTunes its simply "Music From Siesta" by Miles Davis. It like a 30 minute track, found a sampling of it here
Just one of the most depressing songs ever. Usually if Im sad I'll listen to some stuff previously mentioned, helps me heal and get through it. When I'm like depressed or in a worse emotional state than normal "sad" I toss this bad boy on. Makes me more sad, but makes me deal with shit too I guess. No lyrics to listen to, but the music just tells this story,but just gives you a chance to think about life too.