1. Voice
1.1. Bass
1.2. Tenor
1.3. Alto
1.4. Soprano
1.5. Baritone
2. Composition
2.1. Clefs
2.1.1. Treble
2.1.2. Bass
2.1.3. Alto
2.1.4. Tenor
2.2. Notes/Rests
2.2.1. Whole
2.2.2. Half
2.2.3. Quarter
2.2.4. Eigth
2.2.5. Sixteenth
2.3. Lines
2.3.1. Staff
2.3.2. Bar
2.3.3. Dotted
2.3.4. Bracket
2.4. Breaks
2.4.1. Caesura
2.4.2. Breath Mark
2.5. Accidentals
2.5.1. Flat
2.5.2. Sharp
2.5.3. Natural
2.6. Key Signature
2.6.1. Flat
2.6.2. Sharp
2.7. Relationship
2.7.1. Slur
2.7.2. Tie
2.7.3. Glissando
2.7.4. Tuplet
2.7.5. Chord
3. Instruments
3.1. Idiophones
3.1.1. Cymbals
3.1.2. Xylophones
3.2. Membranophones
3.2.1. Drums
3.2.2. Bongos
3.3. Aerophones
3.3.1. Flute
3.3.2. Trumpet
3.4. Chordophones
3.4.1. Violin
3.4.2. Piano
4. Media
4.1. Films/Musicals
4.1.1. Les Miserables
4.1.2. Sound of Music
4.2. TV Shows
4.2.1. Glee
4.2.2. Victorious
4.3. Competitions
4.3.1. The Voice
4.3.2. American Idol
5. Genre
5.1. EDM
5.1.1. Heroes
5.1.2. Clarity
5.2. Pop
5.2.1. Love Yourself
5.2.2. Shake it Off
5.3. Reggae
5.3.1. One Love
5.3.2. Stir it Up
5.4. Classical
5.4.1. Canon in D
5.4.2. The Four Seasons
5.5. R&B
5.5.1. Controlla
5.5.2. One Dance
5.6. Alternative
5.6.1. Radioactive
5.6.2. Centuries
5.7. Metal
5.7.1. Painkiller
5.8. Rock
5.8.1. Back in Black
5.8.2. Dream on
5.8.3. Stairway to Heaven
6. Artists
6.1. Bands
6.1.1. Parokya ni Edgar
6.1.2. The Vamps
6.1.3. Coldplay
6.2. Singers
6.2.1. Beyonce
6.2.2. Drake
6.2.3. Zedd
6.3. Choir
6.3.1. Gospel Choir
6.3.2. Bach Choir
7. Elements
7.1. Pitch
7.1.1. High
7.1.2. Low
7.2. Rhythm
7.2.1. Tempo
7.2.2. Meter
7.3. Melody
7.3.1. Conjunct
7.3.2. Disjunct
7.4. Timbre
7.4.1. Sound quality
7.4.2. Tone color
7.5. Dynamics
7.5.1. Loud
7.5.1.1. Fortissimo
7.5.1.2. Forte
7.5.1.3. Mezzo-Forte
7.5.2. Soft
7.5.2.1. Mezzo-Piano
7.5.2.2. Piano
7.5.2.3. Pianissimo
7.6. Texture
7.6.1. Monophonic
7.6.2. Polyphonic
7.6.3. Homophonic
7.6.4. Heterophonic
7.6.5. Collage