Audio Recorder - Save .wav to server and change optional text

Dear developer community,

I want to use H5P Audio Recorder on my WordPress website in order to allow users to record their voice. Before I can use Audio Recorder, I need to make following modifications:

1) Once a user hit Stop, .wav file should save on the server instead of showing a download button

2) I want to manually change optional text from a text or csv file. So a new text would display in the optional text column after user has hit stop. 

I am new to WordPress and H5P but I have prior programming experience in C++and Python. I shall be very thankful if someone could please point me in the right direction and if possible outline the steps I need to take in order to make these modifications. 

Kind Regards,

Punj