Hall. It featured an original house song interwoven with oral interviews with 100 Chicago-area citizens about family history, architecture, slavery and house music. The music in the installation was driven by the real-time changing stock prices of contemporary American companies with historical ties to the transatlantic slave trade, discovered under the ordinance required by the city. In American Cypher the Obadikes use a small bell that belonged to Sally Hemings as a sound source. They recorded Hemings’ bell and used it to create an immersive sound and video installation. The exhibition included a series of letterpress prints and a book of poems and a live performance. Free/Phase (2014–15) has three components. Part 1: Beacon is a sound installation that played from the rooftop of the Chicago Cultural Center and Stony Island Arts Bank. The piece used a large parabolic speaker to project a narrow beam of sound like a spotlight into the streets of Chicago. It played phrases of freedom songs morning, noon and evening like a church bell or call to prayer. Part 2: Overcome is a video and four-channel sound work. This piece uses sounds from the Edmund Pettus Bridge (the site of 1965's Bloody Sunday) in Selma, Alabama to create a haunting version of the civil right anthem We Shall Overcome. Part 3: In Dialogue with DJs Mendi + Keith invited the public to sit with popular Chicago DJs and have a guided conversation and private listening session using a playlist of freedom songs. Sonic Migration (2015–16) Part 1: Homes is a video and four-channel sound work. The video shows slow moving imagery of the internal architecture of Tindley Temple, a historic Black Philadelphia church against ambient recording of the structure and Mendi + Keith's remix of the Tindley composition "A Better Home." Utopias: Seeking For A City (2018-2019) was inspired by free African-American towns created from the early 1800s to the late 1960s in America. Mendi + Keith researched and visited a few of these historic towns across the U.S. making audio and video recordings. This material became the basis for an installation in an mid-19th century house in at Weeksville Heritage Center in Crown Heights, Brooklyn. The installation featured Mendi + Keith's rendition of the Africa-American spiritual "I am Seeking for A City" playing through the walls, floors and ceiling of the house against a series of Mendi + Keith's framed hand-drawn maps of African-American