Titus Andronicus
In 2009, the band helped arrange and record the Titus Andronicus album "The Monitor". All trumpet, cello, keyboards, and piano parts for the album were recorded with Hallelujah the Hills in Boston in August 2009, including Walsh's backing vocals on "A More Perfect Union" and "Titus Andronicus Forever". After the album's release, the two bands toured together with Hallelujah the Hills opening, and then joining Titus Andronicus halfway through their set to form a large band that recreated the album's arrangements. During the Titus Andronicus after-party show for 2010's Pitchfork Festival, Hallelujah the Hills singer Ryan Walsh took on Jenn Wasner's vocal part to perform the Titus duet "To Old Friends And New".