I supose you folks outside of Texas don't hear much of this style of music. It's called "conjunto" music. It's heard all over the state but it's most notable preformers come the Rio Grande, San Antonio, up the the Hill Country. It's a unique sound that is associated with Texas.  Conjunto has evolved intoTejano music, but conjunto music in it's orignal form is still very popular here in the Lone Star State.