Jennifer Curtis brings her violin to create duets with Tyshawn Sorey on either piano or percussion on these eight improvisations. With Sorey on percussion, he paradiddles to oblivion to Curtis’ bow on “II” and gives some rockish thunder on the driving “”IV” as the two scramble like cockroaches on the scratchy “VII”. Sorey’s piano is stark on “III” and fragile during Curtis’ picks and bows on “VI” as they scurry about on the trudging “ V”. Harrowing conversations.