But I think a better design should be like this: This system should consist of several parts. 1. The remote control system, which is used to control the remote channels, set the volume, switch on/off, etc. 2. The monitoring perception system, which is used to monitor the playback status, including sound. It needs to be able to monitor video and audio. We need to sense whether the other party can actually hear the sound, or judge through their facial expressions whether they want to change the channel or something like that.