My gaming friends were astonished that I could play Winamp music in Mumble, while simultaneously maintaining full voice communications. I've received several emails asking for instructions, and so I'm writing out the technique for anyone who is interested. This 'single-box' method takes some setup time, and some special software, but the results are well worth it. Here is how you play music in Mumble, using Windows on a single computer and double-logins of Mumble...

A 'riff' is when you copy or repeat someone else's online text, particularly when you copy someone else's search keywords. For example 'color filter photography examples' is riffed when you use the exact same phrase for your own searching. Riffing has spawned from social media, where users recommend content discoveries to each other. Riffing is an actual command at the new www.so.cl. social search engine. The term itself comes from the musician term for repeating musical chords.
KCCO is a modern slang acronym for 'Keep Calm, Chive On'. This is a pop culture reference to the TheChive, a blog site dedicated to curious news and bizarre photos. KCCO is a fun way to say 'hang loose, Chivers, and don't take life too seriously'. Read more about TheChive and other modern addictive websites here...
The rules of email etiquette are not "rules" in the sense that I will come after you if you don't follow them. They are guidelines that help avoid mistakes (like offending someone when you don't mean to) and misunderstandings (like being offended when you're not meant to). These core rules of email etiquette help us communicate better via email. Heinz Tschabitscher explains 26 rules of email etiquette here...