Alaka’i 1777 is an immersive sound installation that reconstructs the lost song culture of the Kauaʻi ʻōʻō, an extinct Hawaiian bird, by weaving together archival recordings with interacting artificial agents. 1777 is the last year that the Alaka’i swamp, the Kauaʻi ʻōʻō’s ancestral habitat, was unaffected by European contact. Using a mathematical model of the avian vocal organ (the syrinx), trained on the few surviving recordings of the species, the work generates imagined songs—speculative echoes of what the Kauaʻi ʻōʻō’s vocal repertoire may have been before population decline erased its complexity. As species dwindle, their songs, like human languages, become simpler and less varied, fading with each generation. To give listeners a deeper sense of this lost world, the entire soundscape is slowed down, allowing them to experience the songs as the Kauaʻi ʻōʻō may have perceived them. Within this expanded space, artificial agents act as spectral ancestors, engaging in a dynamic, multi-layered dialogue with real Kauaʻi ʻōʻō recordings, offering a glimpse into a richer, more intricate soundscape that vanished long before the last bird fell silent.