Grab Mumble from mumble.info and add mumble.rys.pw as a server in it!
If the server is down try downloading it directly through this link (Windows).
For Android there's Mumla.
Then to connect to my server:
Server -> Connect -> Add New
Port: 64738 (default)
The default mic setting is voice detection, to just talk at all the times:
Configure -> Settings -> Audio input -> Transmit=Continuous
Or try the web version, although that one doesn't work so great.