While tracking down some surround sound related bugs I was missing a speaker setup and testing utility. So I decided to do something about it and I present you gnome-speaker-setup:
The tool should be very robust and even deal with the weirdest channel mappings. OTOH the artwork is not really good and appropriate. But I hope it still shows some resemblance to other UIs of this type. If you are an artist wand want to contribute better artwork make sure to go through the Gnome Art Requests page, and more specifically this particular request.
This (or something like it) will hopefully and eventually end up in some way or another in gnome-media. Until that day comes I'll maintain this tool independently.