In the midterm feedback, our tutor Philly mentioned that we should think more about technology and how the four parts of our project should be combined together. In the tutorial, he also mentioned the OSC (Open Source Control) to achieve that.
As for the consistency of these four parts, I first tried to implement some Max/MSP functions in Touch Designer. However after some tests, I found that audio processing in TD is very limited. Similarly, other visual effects achieved using TD are also difficult to implement in Max. Therefore, to ensure the coherence of the project display, not only the coherence between these four parts but also the coherence between audio and visual, we need technologies like OSC to realize the connection between different platforms.
The video below shows some simple tests about OSC, which implements a two-way connection between Max and TD, and simple sound and visual effects changes in TD by setting up parameters in Max.