The traditional or classical European aspects of music often listed are those elements given primacy in European-influenced classical music: melody, harmony, rhythm, tone color or timbre, and form. A more comprehensive list is given by stating the aspects of sound: pitch, timbre, loudness, and duration.These aspects combine to create secondary aspects including structure, texture and style. Other commonly included aspects include the spatial location or the movement in space of sounds, gesture, and dance.
Silence has long been considered an aspect of music, ranging from the dramatic pauses in Romantic-era symphonies to the avant-garde use of silence as an artistic statement in 20th century works such as John Cage's 4'33."John Cage considers duration the primary aspect of music because it is the only aspect common to both "sound" and "silence."
As mentioned above, not only do the aspects included as music vary, their importance varies. For instance, melody and harmony are often considered to be given more importance in classical music at the expense of rhythm and timbre. It is often debated whether there are aspects of music that are universal. The debate often hinges on definitions. For instance, the fairly common assertion that "tonality" is universal to all music requires an expansive definition of tonality.
A pulse is sometimes taken as a universal, yet there exist solo vocal and instrumental genres with free, improvisational rhythms with no regular pulse; one example is the alap section of a Hindustani music performance. According to Dane Harwood, "We must ask whether a cross-cultural musical universal is to be found in the music itself (either its structure or function) or the way in which music is made. By 'music-making,' I intend not only actual performance but also how music is heard, understood, even learned."
