Here is the Dance music section
Dance music is a broad term that refers to any kind of music that is created specifically for people to dance to. Considering that music is very personal and its uses are subjective, it can be hard to distinguish dance music from other types and to pinpoint its exact origins. Dance music can also be called Electronic Dance Music or EDM. While EDM, and its many musical genres, may seem new, its actually been around since the 1970s, developing over the years as a symbol of contemporary culture. For decades, the music industry has been providing energy-charged electronic music to raving crowds. But before we recognized these dance parties as raves as we do today, we simply called them discos. Three different kinds of Dance music are Disco, Techno and House. House music gives off a warm sort of vibe and generally adds a positive feeling to the room. Techno Music some might describe techno as cold or mechanical quite the opposite of the warm house music discussed above. It includes plenty of experimental sounds and strives to give off a futuristic feel much of the time. Disco music aimed to move crowds of people on the dance floor, using drum machines and electronic instruments to create synthesized rhythms. During the first half of the 1980s, keyboards and electronic drum kits figured prominently in a number of hugely successful records. Like the music of the 1960s, these songs werent specifically created for dancing, but they had an upbeat tempo and fun sensibility that was common in disco. In the UK, on the other hand, bands like the Pet Shop Boys and Depeche Mode began releasing a different style of electronic music that also reflects disco;s influence. The synth heavy style of bands like Depeche Mode is sometimes referred to as synth pop for its blend of popular styles and heavy use of synthesizers. Drum machines and synthesizers were used more heavily after the disco days, but these electronic music makers were joined by innovations like MIDIt, which revolutionized the way electronic instruments could communicate.
An intro is typically a multiple of 16 beats in length, and often introduces a new instrument or sound every 32 beats. Some intros open with drums and gradually add layers of instruments. A buildup or other aural cue lets you know it is over. Most dance music tracks open with what is often called a four-on-the-floor; rhythm, with the kick drum bumping out a steady boom boom boom boom. Each boom is a beat. It sounds obvious, but when you nod your head or tap your foot, youre really just keeping time with the beat. A phrase is a segment of music, whether a melody or a rhythm, that has a complete musical sense of its own. Put more simply, it has a natural sense of structural completeness a beginning, a middle and an end. For example, you might hear a synth melody that repeats multiple times. Each repetition is probably a phrase it usually consists of 32 or 64 beats (8 or 16 bars), but it can be shorter. Its like a sentence, where each beat is like a word.
My sources for this text is The Los Angeles Film Schools Brief History of EDM and Study.coms What is Dance Music history types and Mixed in keys page on Visualize The Structure Of Dance Music
