Photo Courtesy of The R Train

With their new single “INDIGO,” the South Florida power trio shows that riff rock isn’t just alive… it’s moving forward.

There is a certain electricity that a power trio can generate. The kind of raw, unfiltered voltage that made bands like Grand Funk Railroad and Cream into household names. The R Train , the South Florida-based rock outfit born from a Brooklyn subway ride, has spent years channeling that same frequency into something distinctly their own. Now, with the release of their newest single “INDIGO,” the band is exploring new sonic territory.…