Tessera is a tuned resonator. Play a drum loop, a guitar, a vocal, or a field recording into it, and it blooms that sound into twelve pitched voices that ring, shimmer, and decay in tune. At its core are twelve parallel resonators, each locked to a note of a chord or scale you choose. Whatever you feed them excites those voices, so a single hit becomes a lush chord, a sustained pad, or a slowly evolving cloud. Pick a root and a scale, from majors and minors through ninths, elevenths, whole…