RCA vs optical cable?


Are there any diferences between a regular RCA interconect cable and an aoptical cable? Can I use a regular RCA interconect cable to hoop up a transport and a dac? I understand that both cables have a 75 ohms resistance, so I suppose there is no difference between these cables. I am completely wrong? Any comments. Thanks in advance for your help.
tiofelon
"Jitter can even be euphonic in nature if it has the right frequency content. " This is beyond my jargonistic experience and may be "jitterish b.s."
04-09-12: Ribit
"Jitter can even be euphonic in nature if it has the right frequency content. " This is beyond my jargonistic experience and may be "jitterish b.s."
The statement is not b.s. in any way, although it may sound like it is to someone who does not have relevant technical background.

Also, the paper from which the statement is quoted, which I linked to above, IMO provides some very good background on the subject of jitter.

Disclaimer: I have no affiliation with the author of the paper or his products, not even as a user.

Regards,
-- Al
someone dares to disrespect almarg? does he not fear the wrath of the audio gods?
Distortion can be euphonic or detrimental. How it's done is practically infinite.
Jitter is just another way.
Not too hard to wrap your head around once you really think about it.

All the best,
Nonoise