Flutes have cylindrical holes. They are usually made of metal, often silver or nickel silver obviously there are also other materials such as gold and platinum used in their construction. Adding the keys into the flute (and changing them into the flute) allowed the player to create a wider range of notes and play more complex pieces much more simply compared to older simple flutes.
Music in Dortmund
The city of Dortmund also has a very long history in terms of music. The Dortmund Philharmonic Symphony Orchestra is a German-based symphony orchestra performing at the Konzerthaus Dortmund. Founded in 1887, the orchestra was formed by leaders such as Wilhelm Shuster, Mark Janowski, Moshe Atzmon, and Jacques van Stein. In addition, there are many bands and singers in the city, including Elga Andersen, Ralf Bendix, Theo Bleckmann, Phillip Boa, and Phillip Boa, and the Voodooclub.