I can only speak for myself… If you did not record audio and only wrote the text chances are I would not read it. Not that it isn’t worth reading, it is just the fact that I often do not have the time to sit down and read it. By recording the audio it gives me the chance to listen while engaged in something else not too mentally taxing, like work (ha ha) or when I’m at the gym. That is the worth to me. Since you are the one producing this content it is important that there is some value in it for you. Whatever your reason, whether it is having another forum to express yourself or because you enjoy it, be sure it is a good reason. Keep up the good work.