We've seen Neptune called "scrap-steel instrument rock" and that's a pretty precise description for this Boston trio's junkyard-picked amalgation of art-noise-rock. They make their own instruments out of random rusty garage-sale materials: "bike parts, saws, old metal chairs, self-built oscillators, amplified springs, metal drums with contact mics inside and other debris found in the trash." And they remind us of those good ol' days we used to sit on the kitchen floor banging the shit out of mom's copper-bottomed sauce pans with a metal ladle and serving spoon, 'cept these guys seem to understand how to transform that imaginative cacophony into some amazingly awesome rock-buzz-saw rattletrap compositions. Best of all, they like "hobo synthesizers." The one below is from their upcoming April-bound record Patterns (Mister Records). They, like everybody else in today's trifecta, are playing tonight at the Abbey Lounge, 3 Beacon St, Somerville | 617.441.9631.