@Wayne-TP 

Thanks for replying. The article is of no use. Unfortunately. I have checked the hardware. I have checked it's configuration. I have not checked the cameras placement environment as nothing has changed other than the firmware has been updated and the sound is awful now, it wasn't before. Concerning the important considerations for audio quality, all was considered over a year ago when the camera was positioned, tested and tested again. So basically I have started this to see if any other user of the same camera feels the same as I do or if it's just my camera that doesn't want to function correctly with this firmware. It will be replaced. Though I'm unsure with what camera to purchase, all things considered. Thank you.