1. Intensive sound effects processing and soundtrack: There is a lot of sound effects processing and soundtrack work in film and television production, and various special effects music need to be added in post-production. In this process, part of the original soundtrack needs to be cut to narrate the plot. , allowing the audience to better experience the audio-visual effects of film and television.

2. Modernization needs: The original sound may not be modern enough to cater to current movie viewing tastes. In order for film and television dramas to cater to a wider audience, certain changes in sound quality are necessary.

3. Film and television dramas are more aesthetic: Modern films and television pay more attention to aesthetics, and the audience has high expectations for the aesthetics of the creators. The voices of some actors themselves can be more beautified through mixing, making the film and television More visible and impactful.

4. Economic aspect: The production cost of film and television dramas is high. Using the original sound will increase the production cost, but the cost after mixing will be relatively low. This is also a choice made by the production team considering the economic aspect.