Not long ago I read an article by New York producer and DJ extraordinaire DJ/Rupture expounding on the nature of auto-tune. Essentially, he considered the phenomenon an exemplary synthesis between man and machine. While listening to the rising producer/songwriter Annabel Alpers at Brooklyn’s Union Hall Tuesday night — performing under her Bachelorette moniker — I was thinking the same thing. As an electronica nerd who’s best friend it seems is her laptop, Bachelorette calmly elicited longing, sorrow, and deep introspection in between melodies of shimmery synths and the occasional disco beat. Instead of an unrelenting dance cadence, her songs pulsated with feeling and sentiment. Her awkwardness and self-deprecating quips about her New Zealand origins only further emphasized her strangely sensitive electronic sound. The small crowd and space gave the performance a living-room vibe. While songs like “Doo Wop” and recent single “Mindwarp” were expressive and danceable, Bachelorette’s chipper unease left a cloud of tension in the room — despite her LED bedazzled dress. Listening to Alpers’ latest album, My Electric Family, at home just might suffice next time.