Sean Cunningham has never been afraid to evolve. Before reinventing himself with Whatever That Is — a wildly adventurous, self-produced solo album that blurs the boundaries between alternative, modern pop, indie rock, and lyric-driven Americana — the songwriter spent more than a decade in constant motion, releasing music with several different projects. There was Atlas, the career-launching band that took Cunningham all the way to New Zealand, where the group's chart-topping single "Crawl" set a new record for the longest-running Number 1 hit in Kiwi history. There was also The Cunning, the Led Zeppelin-influenced rock band that he formed after relocating to Nashville. All of that momentum leads Cunningham to his full-length solo debut, Whatever That Is, whose songs are every bit as diverse as the musician who created them. Whatever That Is unfolds like a rallying cry from a musical lifer who remains willing to rebuild, reimagine, and rediscover himself over and over again.