The accordion, as we know it today, was invented in the early 19th century by Christian Friedrich Buschmann. Little did this German instrument maker know how his invention would become integral to such a variety of musical genres, from polka to Zydeco. Some of that music will be represented at the 30th Annual Cotati Accordion Festival, where more than 25 bands will play on different stages. Acts include the Great Morgani, Neuvos Adventurous, Intuitive Compass, Junk Parlor, and Bellow Shakes. The festival will be held September 25–26 at La Plaza Park in Cotati. Tickets at the gate are $21 for one day or $29 for both days. Find out more information and get discounted tickets at cotatifest.com.