1. Rock
1.1. Metal
1.1.1. Iron Maiden, Slipknot, Black Sabbath
1.1.2. Characterized by heavy and distorted guitars and harsh lyrics
1.2. Classic Rock
1.2.1. Pink Floyd, Led Zeppelin, Rolling Stones
1.2.2. Bands that defined rock music and became the backbone of popular music
1.3. Rock n Roll
1.3.1. Elvis, Chuck Berry
1.3.2. Early electric guitar music that used the blues as it's base for chord progressions
1.4. Punk Rock
1.4.1. Ramones, The Clash, The Stooges
1.4.2. Defined the anti-establishment mindset of the late 70s and early 80s for many young people
2. Pop
2.1. Acoustic
2.1.1. Bon Iver, Taylor Swift
2.1.2. Vast selections but characterized by use of mic'd acoustic guitars and solo vocals
2.2. RnB
2.2.1. Bruno Mars, Beyonce
2.2.2. Characterized with smooth chord progressions stemming from 80s pop with use of synths and dance-like beats
2.3. Indie
2.3.1. Tame Impala, Mac Demarco
2.3.2. Characterized by the use of layered instruments with the chorus, delay, and reverb effects on them
3. Classical
3.1. Baroque
3.1.1. Bach
3.1.2. From 1600s to early 1700s
3.1.2.1. Early stringed instruments and organ/harpsichord
3.2. Classical
3.2.1. Mozart, Beethoven
3.2.2. Operas and Symphonies are popular
3.3. Romantic
3.3.1. Chopin, Debussy
3.3.2. Freedom of expression through modal interchanges and staggering harmonic literacy
4. Jazz
4.1. Bebop
4.1.1. Charlie Parker, Dizzy Gillespie, Miles Davis
4.1.2. Fast swing and running improvisational lines
4.2. Swing
4.2.1. Glen Miller
4.2.2. Big bands and dance music
4.3. Ragtime
4.3.1. Scott Joplin, Jelly Roll Morton
4.3.2. Piano based music that uses swing feel
4.3.2.1. Early swing
4.4. Free
4.4.1. Ornette Coleman
4.4.2. Jazz without a tonal or rhythmic center
4.5. Fusion
4.5.1. Jaco Pastorius, Weather Report
4.5.2. Jazz that incorporates elements of other genres like synths or rock based instruments