sudo ps aux | grep pulse
scott     2811  0.1  0.3 424344  6344 ?        S<l  20:26   0:01 /usr/bin/pulseaudio --start --log-target=syslog
scott     2823  0.0  0.1  95940  2992 ?        S    20:26   0:00 /usr/lib/pulseaudio/pulse/gconf-helper
scott     3729  0.0  0.0   9392   932 pts/0    S+   20:40   0:00 grep --color=auto pulse