Country music gets a modern downtown spin when Chaparelle, rising Houston-rooted artist Rodell Duff, and DJ Vinyl Ranch share the Discovery Green stage. Chaparelle channels golden-age harmonies, Duff brings an easy country-rock voice, and Vinyl Ranch closes the circle with its playful country-meets-disco point of view. The concert is free and outdoors, giving groups a low-pressure way to hear several corners of the Texas sound in one Thursday evening.