Desert blues, transcendental electronica and a concept album about a mill powered by music – this year’s shortlisted albums were stunningly diverse, none more so than the crate-digging on the triumphant Tyrchu Sain Desert blues, transcendental electronica and a concept album about a mill powered by music – this year’s shortlisted albums were stunningly diverse, none more so than the crate-digging on the triumphant Tyrchu Sain W hat if I told you that this year’s Welsh music prize shortlist