I saw a performance of this, which is as strange as you would think it was. Charles Spearin came out in the middle of a BSS concert and sort of sheepishly explained it, and then one of the tracks played and his saxophone player friend played along with it.
It was a weird kind of intermission-feeling thing, but I thought/(think) it was a cool idea and the super-stoned kids next to me seemed to be into it.