What two inventions helped jazz reach the us?

The phonograph and the radio were two key inventions that helped jazz reach a wider audience in the United States. The phonograph allowed for the recording and playback of Jazz Music, making it accessible to people in their homes. Meanwhile, the radio facilitated the live broadcast of jazz performances, connecting listeners across the country and popularizing the genre. Together, these technologies played a crucial role in the dissemination and growth of jazz music in American culture.