Close your eyes and think of Hawai?i. That sound you undoubtedly hear??Well, that’s the ocean. But that?other?sound floating on the breeze—that’s the steel guitar, an indigenous Hawaiian invention that has influenced country, blues, and rock music since the turn of the 20th century. This time on Sidedoor, we follow a familiar sound with an unexpected origin and learn how?the steel guitar helped Hawaiians preserve their culture and?change American popular music.