You've exported the environment variable as root and tried (incorrectly) to restart the system-wide daemon, which does not work because you did not configure it correctly. Thus, your changes did not take effect at all. You actually want to pulseaudio -k as your user, not as root.
You've exported the environment variable as root and tried (incorrectly) to restart the system-wide daemon, which does not work because you did not configure it correctly. Thus, your changes did not take effect at all. You actually want to pulseaudio -k as your user, not as root.