I have a 6 channel(RCA) output, is there a converter that will change this output digital coax of toslink

[Rj Bob]

I have a Sony Surround Sound Processor that is 6 channel RCA output, I need to connect it to a Bose Lifestyle surround, I need to adapt the 6 channel RCA to a coaxial or toslink output.. any suggestions

 

[americanaudiophile]

There might not be any advantage to using the Sony.
You would be using it to do your surround processing converting digital to analog. Then having to reprocess it back to digital with some device (which I don't think you will find). Then having the Bose reprocess it back to analog again. Just adds redundant processing.
If you need more inputs to the Boss buy a digital input selector.

 

[Rj Bob]

There might not be any advantage to using the Sony.
You would be using it to do your surround processing converting digital to analog. Then having to reprocess it back to digital with some device (which I don't think you will find). Then having the Bose reprocess it back to analog again. Just adds redundant processing.
If you need more inputs to the Boss buy a digital input selector.

 

[Rj Bob]

the Sony ac3-rf demod is bullt in I am trying use this... I have Pioneer LD d704 with has dolby digital output + ac3-rf rhis was the reason for the sound processor... any suggestions

 

[americanaudiophile]

Now I see said the blind man.
You would need a Dolby Digital encoder that would accept the analog inputs and process them to a digital output. Not a consumer item. The only one I could find online is no longer made Dolby labs on Ebay for $160 but it takes digital inputs not analog so you would need 3 ADCs to convert the Sony outputs, Overall it would cost more than it's probably worth to you.
If you had a AV receiver, some of which have 5.1 analog inputs, you could use the Sony but not with the Bose.