What instruments expanded in size and sounds during the twentieth century?

During the twentieth century, several Musical Instruments expanded in size and sound, notably the piano and the synthesizer. The piano evolved with the introduction of larger concert grand models, enhancing its dynamic range and tonal richness. Synthesizers emerged as versatile electronic instruments, capable of producing a wide array of sounds through innovative technology. Additionally, orchestral instruments like the tuba and double bass saw developments in design and construction, allowing for greater volume and a broader spectrum of tonal possibilities.