There have been many pretty and sorrowful pieces written for cello in recent years, yet Alder & Ash seem discontent in this mild approach, opting instead to purge the demons with a more unsettling and destructive aural palette. Not to say it’s all doom and gloom, as the moments of tension do give way to some resolve and enlightenment, but the true genius of Alder & Ash’s music lies in the balance of these extremes.