MUDDYDWARF… You may need an Optical digital cable to connect the ps3 to surround sound. With my surround system I connect the HDMI from PS3 direct to tv and I run a Optical digital cable from PS3 direct to AMP.
This is the correct way to get the best sound out of the PS3.
You can also connect HDMI as described above and use the RED YELLOW WHITE cable that came with PS3. Only use the RED and WHITE plugs into the surround sound.
The surround sound wont work properly doing it this way.
Optical Cables are about £20.
Hope that helps.