Kallor joins an all-star roster of musicians, including Joyce DiDonato, Yo-Yo Ma, Jamie Barton, Isabel Leonard, Susanna Phillips, Anthony McGill, actors Sharon Stone and Ansel Elgort, and many more, for An AIDS Quilt Songbook: Sing for Hope. Kallor recorded two songs for the album, with Melody Moore - "One Child," which Kallor composed for this project - and Matthew Polezani. All profits from the sale of this album go to amfAR, The Foundation for AIDS Research.
"Among the brand new songs created expressly for this recording is "One Child," featuring beautiful lyrics by Sara Cooper that point to the promising possibility of a child surviving AIDS and ushering in a new era of health and well-being where once there was so much death and suffering. The poet asks "Is this the moment? Is this the time? Is this when we leave it all behind us? When soon only whispers will remind us of those awful scorching decades that took so many lives." Gregg Kallor has set these lyrics with utmost care, with gentle dissonance that perfectly captures the longing of the text. Soprano Melody Moore's singing is exemplary for its beauty and clarity."