As a musician, Kirby has collaborated with artists including Remi Wolf, Solange, Frank Ocean, Miley Cyrus, Norah Jones, Bat for Lashes, Connan Mockasin, Sébastien Tellier, Harry Styles, Tyler, the Creator and others.
In 2007, Kirby contributed to will.i.am's Songs About Girls, Jully Black's Revival, and Raya Yarbrough's self-titled LP before going on to work on albums by Mike Doughty, Norah Jones, David Holmes, and Madeleine Peyroux.
After collaborations with INGA, Sébastien Tellier, Midnight Juggernauts' Daniel Stricker and Shabazz Palaces, Kirby issued his first solo album, Travel, on OUTSIDE INSIGHT and Meditations in Music on Leaving Records in 2017.
In 2019, Kirby was featured on Solange's When I Get Home, Bat for Lashes' Lost Girls, Mark Ronson's Late Night Feelings, as well as Frank Ocean's DHL and Harry Styles' Canyon Moon.
The music video for the album's first single, Rainmaker, features musicians from Kirby's ensemble, along with special guests Mac DeMarco, Eddie Chacon, Cola Boyy and comedian Kerwin Frost.