Music is the arrangement of sound to create some combination of form, harmony, melody, rhythm, or otherwise expressive content. However, definitions of music vary depending on culture, though it is an aspect of all human societies and a cultural universal. While scholars agree that music is defined by a few specific elements, there is no consensus on their precise definitions. The creation of music is commonly divided into musical composition, musical improvisation, and musical performance, though the topic itself extends into academic disciplines, criticism, philosophy, psychology, and therapeutic contexts. Music may be performed using a vast range of instruments, including the human voice to sing, and thus is often credited for its extreme versatility and opportunity for creativity.
Grooved side of the Voyager Golden Record launched along the Voyager probes to space, which feature music from around the world
In Greek mythology, the nine Muses were the inspiration for many creative endeavors, including the arts, and eventually became closely aligned with music specifically.
Bone flute from Geissenklösterle, Germany, dated around c. 43,150–39,370 BP.
Indian women dressed in regional attire playing a variety of musical instruments popular in different parts of India
In music, harmony is the concept of combining different sounds together in order to create new, distinct musical ideas. Theories of harmony seek to describe or explain the effects created by distinct pitches or tones coinciding with one another; harmonic objects such as chords, textures and tonalities are identified, defined, and categorized in the development of these theories. Harmony is broadly understood to involve both a "vertical" dimension (frequency-space) and a "horizontal" dimension (time-space), and often overlaps with related musical concepts such as melody, timbre, and form.
Barbershop quartets, such as this US Navy group, sing 4-part pieces, made up of a melody line (normally the lead) and 3 harmony parts.
Example of implied harmonies in J.S. Bach's Cello Suite no. 1 in G, BWV 1007, bars 1–2. Playⓘ or Play harmonyⓘ