### Instruction:
Based on the passage below, summarize Beethoven's contributions to western music.

### Input:
Beethoven expanded the formal and emotional scope – not to mention length – of nearly every genre in which he wrote. While he is most famous for his heightening of the symphonic form, Beethoven also had a dramatic influence on the piano sonata, violin sonata, string quartet and piano concerto, among several others. Only in the realm of vocal composition – opera and the mass – was his effect on later generations muted.

Beethoven's stylistic innovations bridge the Classical and Romantic periods. The works of his early period brought the Classical form to its highest expressive level, expanding in formal, structural, and harmonic terms the musical idiom developed by predecessors such as Mozart and Haydn. The works of his middle period were more forward-looking, contributing to the musical language and thinking of the Romantic era, inspiring composers such as Franz Schubert, Felix Mendelssohn, Robert Schumann, Franz Liszt, Richard Wagner, and Johannes Brahms. His late period works were characterized by formal, harmonic, and structural experimentation at the highest level, often pointing toward contrapuntal tendencies and microscopic textures, as well as an increasingly introverted compositional outlook. Though rightly credited as a major harbinger of the Romantic era in music that followed, Beethoven never abandoned the fundamental formal paradigms and generally objective artistic philosophy characterizing musical Classicism to the same extent that later composers such as Berlioz or even Schubert did.

### Response:
- Heightened the symphonic form and had a dramatic influence on the piano sonata, violin sonata, string quartet, piano concertos and other genres
- Contributed to the musical language and thinking of the romantic era
- Formal, harmonic and structural experimentation in his later works