chromaticism
/kroʊˈmætɪˌsɪzəm/
noun
- The use of notes outside the main key in music, creating a rich or tense sound.
- In jazz, chromaticism is a common technique for adding emotional depth.
- The composer's use of chromaticism gives the symphony a haunting quality.
- The piano piece is full of chromaticism, with many sharps and flats.