Acoustic Music

Acoustic music comprises music that solely or primarily uses instruments which produce sound through entirely acoustic means, as opposed to electric or electronic means. The retronym "acoustic music" appeared after the advent of electric instruments, such as the electric guitar, electric violin, electric organ and synthesizer.

Performers of acoustic music often increase the volume of their output using electronic amplifiers. However, these amplification devices remain separate from the amplified instrument and reproduce its natural sound accurately. Often a microphone is placed in front of an acoustic instrument which is then wired up to an amplifier.

Following the increasing popularity of the television show MTV Unplugged during the 1990s, acoustic (though in most cases still electrically-amplified) performances by musical artists who usually rely on electronic instruments became colloquially referred to as "unplugged" performances.

Pop Music

Pop music (a term that originally derives from an abbreviation of "popular") is usually understood to be commercially recorded music, often oriented towards a youth market, usually consisting of relatively short, simple songs utilizing technological innovations to produce new variations on existing themes. Pop music has absorbed influences from most other forms of popular music, but as a genre is particularly associated with the rock and roll and later rock style.

The term "pop song," is first recorded as being used in 1926 in the sense of a piece of music "having popular appeal".[4] Hatch and Millward indicate that many events in the history of recording in the 1920s can be seen as the birth of the modern pop music industry, including in country, blues and hillbilly music.

According to Grove Music Online, the term "pop music" "originated in Britain in the mid-1950s as a description for Rock and roll and the new youth music styles that it influenced ..." The Oxford Dictionary of Music states that while pop's "earlier meaning meant concerts appealing to a wide audience ...since the late 1950s, however, pop has had the special meaning of non-classical music, usually in the form of songs, performed by such artists as the Beatles, the Rolling Stones, ABBA, etc." Grove Music Online also states that "... in the early 1960s [the term] ‘pop music’ competed terminologically with Beat music [in England], while in the USA its coverage overlapped (as it still does) with that of ‘rock and roll’." Chambers' Dictionary mentions the contemporary usage of the term "pop art"; Grove Music Online states that the "term pop music ... seems to have been a spin-off from the terms pop art and pop culture, coined slightly earlier, and referring to a whole range of new, often American, media-culture products".

From about 1967 the term was increasingly used in opposition to the term rock music, a division that gave generic significance to both terms. Whereas rock aspired to authenticity and an expansion of the possibilities of popular music, pop was more commercial, ephemeral and accessible. According to Simon Frith pop music is produced "as a matter of enterprise not art", is "designed to appeal to everyone" and "doesn't come from any particular place or mark off any particular taste". It is "not driven by any significant ambition except profit and commercial reward ... and, in musical terms, it is essentially conservative". It is, "provided from on high (by record companies, radio programmers and concert promoters) rather than being made from below ... Pop is not a do-it-yourself music but is professionally produced and packaged".