Sound and video artist MPLD works in a world of sentiment and detachment, creating a Lost & Found aesthetic uniquely his own. Lost are the old Kodachrome slides which make up the foundation of his work. Found are the feelings of misplaced memories the slides conjure, as well as the sounds — processed and amplified — of the projectors that bring those images back to life. What’s seen on lacunae is a straight shot of the screen during a rehearsal for a concert, although that might not be clear to …