Final Answer:
The main idea of the speech is that when digital music is created, many of the instruments are reduced or edited out. Thus the correct option is 1).
Step-by-step explanation:
The speech primarily focuses on the impact of digital music production on the richness of sound. The assertion that "when digital music is created, many of the instruments are reduced or edited out" underscores the technological aspects of modern music production. The speaker suggests that in the process of digitizing music, certain instruments undergo reduction or editing, potentially altering the original composition. This insight reflects a critical perspective on the evolution of music production techniques and the potential consequences for the overall listening experience.
Furthermore, the speech does not solely critique digital music; it also implicitly contrasts it with other formats. While the statement addresses the reduction of instruments in digital music, it does not necessarily assert the superiority or inferiority of this process. Instead, it presents a key aspect of digital music production for the audience to consider. The main idea is to prompt reflection on the changes in music creation brought about by digitization, without explicitly dismissing or endorsing the practice.
In conclusion, the main idea encapsulates the transformative impact of digital music creation on the inclusion of instruments. The speech aims to engage the audience in contemplating the implications of these changes for the overall quality and authenticity of the musical experience in the digital age.