Connecting PS3 to speakers that do not have optic audio input

[coxmattycox]

Hi,

I am looking at connecting my PS3s audio to my 7.1 speakers (although only interest in 5.1)

I stupidly presumed the speakers had optic audio input which they don't....

is there any other way in connecting my ps3 to my 7.1 speakers which have 4 audio inputs. by default it has a 4 in 1 to a 3 in 1 connection which goes into the standard pc audo card from the speakers. (Creative X-fi)

Is there any such adapter that can be used?

Thanks in advance