Thank you for your detailed description! You showed us a vivid picture about that day.
It is lucky to have Master Ou to "discuss the knowledge and the original authors as well as the correct form for the chanting" by face to face. Even though Chinese is my native language, I am too not sure that I understand all the poems' meaning.
Just like you said, if we close eyes and listen, then we will feel the power from the Chanting. My recent experience was that I started listening the Chanting from standing and ended up with lying on the ground. How powerful its automatic healing is!