When Frank Solis found the tapes, he almost threw them out. He and his family — as well as the music world — had assumed that his father, Michigander and Tejano music pioneer Martin Huron Solis Jr., had never recorded the songs that made him a pioneer in Detroit’s music scene of the 1940s and ‘50s. Though Martin was inducted into the Tejano R.O.O.T.S. Hall of Fame in 2018, he was best known for his compelling live performances and hadn’t ever released an album with his fellow musicians, who made up Los Primos. [Get Stateside on your phone: subscribe on Apple Podcasts or Google Podcasts today.]