What is an octave on the recorder?

An octave on the recorder refers to the interval between one musical pitch and another that is double its frequency. When playing the recorder, producing an octave involves using different fingerings or techniques to reach higher notes that sound harmonious with the lower notes. For example, if you play a C note, the C note an octave higher will sound brighter and more resonant. Octaves are essential for creating melodies and harmonies in music.