Originally posted by: TitusTroy
sorry about the confusion...I was thinking about buying the DDTS-100 decoder because I thought I would be able to connect them via the optical SPDIF connection...but now I don't think I would need the DDTS decoder so I want to connect my Inspire P5800 speakers which has an "AUX" jack which according to the manual says "Stereo-to-Stereo Cable 1/8" (3.5mm)...so I wanted to use that jack to connect to my X-Fi ExtremeMusic sound card which has a "Digital I/O" jack...
can I hook these 2 things up via the RCA adapter you mentioned earlier?
That's just another analog input I think.
The short version of what I'm about to say is "don't do it, just connect with analog"
The long version:
Ok, so you have some sound info on your comptuer that eventually has to get to your speakers. It's digital to start with and you need it analog in the end (even "digital seakers" are analog).
So among other things you have to change from digital to analog somewhere.
What you have now is pretty much ideal
Computer --> X-Fi does a great job changing to analog --> speakers
What you're proposing is
Computer --> X-Fi passes digital --> DDTS-100 converts to analog but not as well as the X-Fi --> speakers
Option 1 that you have now is great. If you're trying to get better quality overall, get better speakers or some decent headphones. Your analog source coming out is about as good as it's going to get. The weak point is your speakers at this point.
Option 2 will sound the same or worse probably but you'll get more connection options, you'll loose 5.1 sound from sources that aren't DD/DTS encoded (like games), and you'll spend big bucks.
So, instead of trying to find a DDTS-100 (I think they're out of production), if you really want to mess around with digital get a nicer set of speakers and if you want get one with a digital input like z-5500s for about $225.