Media and technology

The music that composers and songwriters make can be heard through several media; the most traditional way is to hear it live, in the presence of the musicians (or as one of the musicians), in an outdoor or indoor space such as an amphitheatre, concert hall, cabaret room, theatre, pub, or coffeehouse. Since the 20th century, live music can also be broadcast over the radio, television or the Internet, or recorded and listened to on a CD player or Mp3 player.

Some musical styles focus on producing songs and pieces for a live performance, while others focus on producing a recording that mixes together sounds that were never played "live." Even in essentially live styles such as rock, recording engineers often use the ability to edit, splice and mix to produce recordings that may be considered "better" than the actual live performance. For example, some singers record themselves singing a melody and then record multiple harmony parts using overdubbing, creating a sound that would be impossible to do live.

Technology has had an influence on music since prehistoric times, when cave people used simple tools to bore holes into bone flutes 41,000 years ago. Technology continued to influence music throughout the history of music, as it enabled new instruments and music notation reproduction systems to be used, with one of the watershed moments in music notation being the invention of the printing press in the 1400s, which meant music scores no longer had to be hand copied. In the 19th century, music technology led to the development of a more powerful, louder piano and led to the development of new valves brass instruments.

In the early 20th century (in the late 1920s), as talking pictures emerged in the early 20th century, with their prerecorded musical tracks, an increasing number of moviehouse orchestra musicians found themselves out of work. During the 1920s, live musical performances by orchestras, pianists, and theater organists were common at first-run theaters. With the coming of the talking motion pictures, those featured performances were largely eliminated. The American Federation of Musicians (AFM) took out newspaper advertisements protesting the replacement of live musicians with mechanical playing devices. One 1929 ad that appeared in the Pittsburgh Press features an image of a can labeled "Canned Music / Big Noise Brand / Guaranteed to Produce No Intellectual or Emotional Reaction Whatever"

Since legislation introduced to help protect performers, composers, publishers and producers, including the Audio Home Recording Act of 1992 in the United States, and the 1979 revised Berne Convention for the Protection of Literary and Artistic Works in the United Kingdom, recordings and live performances have also become more accessible through computers, devices and Internet in a form that is commonly known as Music-On-Demand.

In many cultures, there is less distinction between performing and listening to music, since virtually everyone is involved in some sort of musical activity, often in a communal setting. In industrialized countries, listening to music through a recorded form, such as sound recording on record or radio became more common than experiencing live performance, roughly in the middle of the 20th century. By the 1980s, watching music videos was a popular way to listen to music, while also seeing the performers.

Sometimes, live performances incorporate prerecorded sounds. For example, a disc jockey uses disc records for scratching, and some 20th-century works have a solo for an instrument or voice that is performed along with music that is prerecorded onto a tape. Some pop bands use recorded backing tracks. Computers and many keyboards can be programmed to produce and play Musical Instrument Digital Interface (MIDI) music. Audiences can also become performers by participating in karaoke, an activity of Japanese origin centered on a device that plays voice-eliminated versions of well-known songs. Most karaoke machines also have video screens that show lyrics to songs being performed; performers can follow the lyrics as they sing over the instrumental tracks.

The Internet

The advent of the Internet and widespread high-speed broadband access has transformed the experience of music, partly through the increased ease of access to recordings of music via streaming video and vastly increased choice of music for consumers. Chris Anderson, in his book The Long Tail: Why the Future of Business Is Selling Less of More, suggests that while the traditional economic model of supply and demand describes scarcity, the Internet retail model is based on abundance. Digital storage costs are low, so a company can afford to make its whole recording inventory available online, giving customers as much choice as possible. It has thus become economically viable to offer music recordings that very few people are interested in. Consumers' growing awareness of their increased choice results in a closer association between listening tastes and social identity, and the creation of thousands of niche markets.

Another effect of the Internet arose with online communities and social media websites like YouTube and Facebook, a social networking service. These sites make it easier for aspiring singers and amateur bands to distribute videos of their songs, connect with other musicians, and gain audience interest. Professional musicians also use YouTube as a free publisher of promotional material. YouTube users, for example, no longer only download and listen to MP3s, but also actively create their own. According to Don Tapscott and Anthony D. Williams, in their book Wikinomics, there has been a shift from a traditional consumer role to what they call a "prosumer" role, a consumer who both creates content and consumes. Manifestations of this in music include the production of mashes, remixes, and music videos by fans.