Be|Longing is an interactive installation and social experiment that invites two people to find harmony—both musically and emotionally. Standing across from each other, each participant uses a Novation Launchpad to trigger loops in different keys while a projection-mapped cube between them reacts in real time to every sound. The pair have four minutes to listen, respond, and align—privately crafting their own sonic chemistry while the audience hears only ambient solfeggio tones. When the countdown ends, their final harmony fills the space, revealing what connection sounds like when shaped through deep listening. Blending Ableton, Resolume, and TouchDesigner, Be|Longing explores the duality between being and longing—a meditation on coexistence, empathy, and the subtle intelligence of sound.