Many visitors come to experience Austria's musical heritage. Salzburg and Vienna offer world renowned opera, classical music and jazz at moderate prices, but performances of high standards are also widely available throughout the rest of the country. There are dozens of Summer festivals for all tastes, the most famous being the avant-garde Salzburg festival (Salzburger Festspiele) but because they're aimed at tourists prices can be high. Austria's strong musical tradition is not confined to classical music alone. Austrian folk music (Volksmusik) is an integral part of rural Austria, and is said to have influenced many of the nation's big composers. In the Alps almost every village has its own choir or brass band (Blasmusik), and you'll often see groups of friends sitting down to sing Lieder in rural pubs. Traditional Alpine instruments are the accordion and zither. In Vienna a type of melancholic violin music known as Schrammelmusik is often performed in Restaurants and Heurigen.