Jóhann Jóhannsson's passed away
He'd risen to fame in recent years because of his film scores but the guy was fantastic as just a pure musician too. Fordlandia's my personal favourite of his albums but IBM 1401 is also well worth checking out as well because it's a fantastic execution of what sounds like a dumb concept (coupling computer sounds recorded by his dad in the 70's with his composition).
After being largely nonplussed by the shitloads of celebrity deaths of recent years this year has already seen three artists whose work I really care about gone.