Musicians are artists. It might be easy for a musician to get lost in a list of Boston piano dealers, or Los Angeles guitar shops because their instrument is their livelihood. Art is characterized by expression of emotion, but it does not have to be limited to paintings, drawings or sculptures. Music has key similarities to traditional art, despite its couple of differences.
Music could be described as the sum of its parts, just like art. Each sound in a song is uniquely composed into a larger product. Every note blends into the next one to create a cohesive song. Traditional art is much the same. Each brush stroke or drawn line serves as a key component for the overall piece of work. It is composed in a precise way to create the final product. More importantly, both music and traditional art can elicit emotion. They are both typically created from emotions of the author and people may experience that emotion when enjoying the piece.
One obvious difference is that traditional art is a visual experience, while music is an auditory experience. Someone could close their eyes while listening to music and still receive the message of the sounds. Alternately, someone could cancel out all noise while looking at a painting and still feel the emotion in it. With this sensory deprivation inversed, however, the message would not make it through to the audience. Another difference is that music might have the potential to be more widespread than traditional art because it is not stationary. Most traditional art lives its life in a museum or house, while music can be performed and shared regardless of location.
Despite these two differences, music can still have enough similarities to be considered art. It can accomplish the main goal of art, which is to elicit emotion in the audience.