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At times conflicting and at others harmonious, the relationship between machines and unpredictability takes center stage at Galeria Nara Roesler in a solo exhibition by Minas Gerais-based duo O Grivo, consisting of Nelson Soares and Marcos Moreira. The show will feature four sound installations, one video and specially created works. The duo will also enact a musical improvisation performance during the exhibition opening.

In the exhibit, a bevy of hybrid sound machines operate both automatically (driven by engines) and by the turning of cranks. The sounds are amplified by contact pickups …