Harp
Like the folk harp, the pedal harp is tuned like the white keys on a piano. However, it has seven pedals to let the harp player play music in different keys. Each pedal, named after the different musical notes,  has three places. For the A pedal, the usual place makes all the A strings sound like a normal A (A-natural). The lower place makes all the A strings on the harp sound like A-flat, while the higher place makes all the A strings sound like A-sharp.