Learning how to use it. + another question

Hello, I see the repo says: "python diarize.py -a AUDIO_FILE_NAME" This is how to use it. Ok but what would be the output? No extra setup other than the instllation and preparing an audio file? No audio format converting? Audio trimming ? Audio separation music/vocals? Please tell me everhting I need to know^^ I would have liked to have a full example from A to Z.

2. From your experience (maintainer and others) is this the only tool to be able to identify the speaker / and separate speakers actually?

Thanks