After a pair of quintet offerings with Brad Mehldau and Ambrose Akinmusire, Austrian guitarist and composer Wolfgang Muthspiel returns to the trio format he established on ECM with 2014's Driftwood. Whereas the previous outings all featured bassist Larry Grenadier, it is Scott Colley who claims the bass chair here. All three members have worked with one another sufficiently to make Angular Blues sound relaxed, natural, and locked in. Blade and Muthspiel have been working together on-stage and in the studio for quite a while; in addition to Muthspiel's bands, the pair work together in the duo Friendly Travelers. The guitarist and Colley played together often in the '90s, and the bassist and drummer have worked together in the Steel House trio with pianist Edward Simon. The group cut this date in a Tokyo studio after a three-night, six-set run at the city's Cotton Club…