On their Avia Gardner début, More Than Tongue Can Tell, Mitchell Akiyama and Jenna Robertson invited listeners into a world of sepia-toned melodies and delicate instrumentation. The Montréal group’s follow-up, recorded in the isolation of the Massachusetts countryside, leaves most of the Baroque frills and digital intervention behind. Mill Farm’s spare, lo-fi beauty reflects a process of withdrawal into a hidden room where instruments were the only furniture. In this, Mill Farm is as much ritual as music.