Giovanni Maruzzelli i am very thankfull to u for this work and i can confirm this is working
but i am unable to find this file in centos 6.5
edit /etc/init/pulseaudio.conf
# uncomment "start on ..."
and 2nd problum is it is using much cpu how to lower cpu usage
below is output from 6 active skype calls
total 12 interfaces of skype all diffrent usernames
top - 17:36:25 up 7:02, 3 users, load average: 2.88, 2.89, 2.98
Tasks: 227 total, 2 running, 225 sleeping, 0 stopped, 0 zombie
Cpu(s): 27.1%us, 10.6%sy, 0.0%ni, 60.6%id, 1.4%wa, 0.0%hi, 0.2%si, 0.0%st
Mem: 2041824k total, 1904288k used, 137536k free, 6176k buffers
Swap: 4095996k total, 395428k used, 3700568k free, 157360k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1891 pulse 9 -11 79644 6704 1728 S 15.7 0.3 39:35.80 pulseaudio
2257 root 20 0 316m 90m 10m S 13.8 4.5 13:34.14 skype
2515 root 20 0 355m 153m 10m S 11.8 7.7 26:37.42 skype
2637 root 20 0 319m 125m 10m S 11.8 6.3 19:15.48 skype
1949 root 20 0 355m 108m 10m S 9.8 5.4 24:28.94 skype
2023 root 20 0 365m 110m 10m S 9.8 5.6 22:55.65 skype
2152 root 20 0 319m 79m 10m S 9.8 4.0 21:47.23 skype
10396 root -2 -10 241m 43m 5808 S 7.9 2.2 15:00.11 freeswitch
2327 root 20 0 310m 112m 10m S 3.9 5.7 23:36.86 skype
2388 root 20 0 303m 79m 10m R 3.9 4.0 9:46.91 skype
2452 root 20 0 306m 98m 10m S 3.9 5.0 12:21.81 skype
3193 root 20 0 62776 21m 5764 S 3.9 1.1 11:45.45 asterisk
2090 root 20 0 335m 88m 10m S 2.0 4.5 20:55.37 skype
2498 root 20 0 18004 5756 1644 S 2.0 0.3 0:03.22 Xvfb