1. Strings:
- Violins
- Violas
- Cellos
- Double basses
2. Woodwinds:
- Flutes
- Oboes
- Clarinets
- Bassoons
3. Brass:
- Trumpets
- Trombones
- French horns
- Tubas
4. Percussion:
- Timpani
- Bass drums
- Cymbals
- Snare drums
- Triangle
5. Keyboard:
- Piano
6. Harp
These instruments form the core of a symphony orchestra, and depending on the specific piece being performed, other instruments may be added, such as piccolo, English horn, bass clarinet, contrabassoon, Wagner tubas, and various types of percussion instruments.