1. Stringed Instruments
1.1. Fretted
1.1.1. Fretted Guitar
1.1.1.1. Acoustic
1.1.1.2. Electric
1.1.2. Mandolin
1.1.3. Banjo
1.1.4. Fretted Bass
1.1.5. Ukulele
1.2. Fretless
1.2.1. Fretless Guitar
1.2.2. Upright Bass
1.2.3. Cello
1.2.4. Violin
1.2.5. Viola
2. Wind Instruments
2.1. No Reed
2.1.1. Flute
2.2. Piccolo
2.3. Single Reed
2.3.1. Clarinet
2.3.1.1. Alto
2.3.1.2. Bb
2.3.1.3. Eb
2.3.1.4. Bass Clarinet
2.3.1.5. Contra Bass Clarinet
2.3.2. Saxophone
2.3.2.1. Soprano
2.3.2.2. Alto
2.3.2.3. Tenor
2.3.2.4. Bass
2.3.2.5. Baritone
2.4. Double Reed
2.4.1. Oboe
2.4.2. English Horn
2.4.3. Bassoon
2.4.4. Contra Bassoon
2.4.5. Bagpipes
3. Brass Instruments
3.1. Valve
3.1.1. Trumpet
3.1.2. Tuba
3.1.3. Horn
3.1.4. Coronet
3.2. Slide
3.2.1. Trombone
4. Percussion Instruments
4.1. Keyboard
4.1.1. Mallet
4.1.1.1. Xylophone
4.1.1.2. Marimba
4.1.1.3. Glockenspiel
4.1.1.4. Vibraphone
4.1.2. Key
4.1.2.1. Piano
4.1.2.1.1. Grand
4.1.2.1.2. Baby Grand
4.1.2.1.3. Upright
4.1.2.2. Harpsichord
4.1.2.3. Organ
4.2. Sticks/Skins
4.2.1. Marching
4.2.1.1. Quads
4.2.1.2. Bass
4.2.1.3. Snare
4.2.2. Drumset/Percussion
4.2.2.1. Kit
4.2.2.2. Djembe
4.2.2.3. Bongos
4.2.2.4. Congas