Changes

Launch the application then '''go through the Audio Wizard'''. It will help you identify most issues and get them resolved before connecting to the server. Once that's finished, a dialogue should pop up prompting you to do just that. Click <kbd>Add New...</kbd>, enter <code>nixnet.xyz</code> as the address, leave the port as default, enter the username you'd like to use, then give the server a friendly name with the <kbd>Label</kbd> box. You'll be able to quickly connect to the server again by clicking it as an option under <code>Favourite</code>.

Mumble has a very odd way of granting different permissions to different users. This is done via the Access Control List (ACL).