@Sean I wish i had seen your Module a view days earlier. Last week i desided to develop a volume control Module by my self (https://github.com/Tom-Hirschberger/MMM-VolumeControl). Your Module has nearly the same functionaltiy but looks nicer than mine. Mayby we can join forces. I try to take a closer look to your Module the next days. If something is missing i try to add it and make a pull request?