This influx of new voices finds Deerhoof exploring a number of different styles and sounds, all the while keeping that chaotic exuberance they are known for. The band go from funky tropical rhythms on "Con Sordino" to '80s power pop glory on "I Will Spite Survive" to borderline operatic on "Gracias a la Vida," a fantastic reimagining of Violeta Parra's Chilean folk classic. These genre-bending jumps create an emotionally charged record underscored by the use of other voices. In some instances, the voices blend nicely, as on opening cut "Slow Motion Detonation," which features Juana Molina, while on "Your Dystopic Creation Doesn't Fear You," Awkwafina shouts and raps aggressively over heavy guitar and huge synth swells as lead singer Satomi Matsuzaki sings delicately over the more subdued chorus.
On Deerhoof's cover of the Staples Singers' "Freedom Highway," the band chug along as Matsuzaki fills the song with a new sense of determination, revealing the timelessness of the song and providing an emotional centrepiece for Mountain Moves. Its relevance still shines through as Matsuzaki sings "There is just one thing / I can't understand my friend / Why some folk think freedom / Was not designed for all men." (Joyful Noise)