How to detect the noise, breaks and multi-person speak in a audio?

[TomSuen]

Hello, I am not in the audio field. I would like to ask, for a reference audio, I have removed BGM and reverberation to a certain extent, but the effect of inputting it into the sound cloning is still not good. Is there any better way to detect whether there is noise, distortion, and multiple people speaking in the reference audio?