Test Sounds Missing After Messing With Pulseaudio and JACK

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http://askubuntu.com – So after installing JACK and using 'sudo usermod -a -G audio username' and restarted. This made JACK work however no program using pulseaudio (more or less everything) made any sound. I purge removed Pulseaudio, restarted, reinstalled it, restarted and finally the sound was working again. The only place sound won't come from is the test area in sound preferences. I realise that performing a command I know little about was daft and that those test sounds aren't of very high importance, but I like things to run as intended. If anyone can help, it'd be very appreciated. Thanks in advance. (HowTos)