Final answer:
The book “Treatise on Instrumentation” influenced the size and composition of orchestras, leading to the addition of new instruments and larger sections. Composers like Hector Berlioz experimented with different combinations of instruments, creating new sounds in orchestral music.
Step-by-step explanation:
The book “Treatise on Instrumentation” had a significant impact on orchestras during the Romantic period and beyond by influencing the size and composition of orchestras. It provided guidance on how to orchestrate music effectively, leading to the expansion of the orchestra with the addition of new instruments and larger sections.
Composers like Hector Berlioz, who wrote the “Treatise on Instrumentation,” also experimented with different combinations of instruments, creating new and unique sounds in orchestral music.