Due to space restrictions, 2 pcs are sharing one set of speakers(home theater quality, but very compact and fits my needs.)
Game system.
X-fi titanium connected to Edifier S550s. Gets the job done for me and saves space.
Media Center
Onboard connected to the same speakers.
To allow both to play at the same time(Rant down below **) the 2 computers are summed/combined through a 10k resistor per channel with a makeup gain provided by some opa2134(nothing special, easy to come by and cheap) opamps. Yay for poor mans mixer(no volume control even, just straight combining and switches for 2 channel sound to run on front and rear at the same time per pc[not needed with the x-fi, but added for completeness].)
So output -> 10k resistor -> inverting input(10k feedback on the opamp to give me the same level as before the resistor) -> 10k resistor -> inverting input on the other side of the opamp(they have 2 per dip 8 chip) with another 10k feedback resistor(It was easy to get lots of 10ks
)
Why inverting? so that each system does not become part of the gain equation(the volume would change when a system is added or removed.).
So yeah, I have 6 of those on
one board
I kind of dislike the new digital world because it seems most setups only allow ONE input to play at the same time. Simply put, I do NOT like this. I need to learn how to make a DAC(well get the prints to use a chip version) to do mixing then push it back to digital, but thats lots more parts for little gain to my ears.
If anyone has some idea's on that, Optical would remove ANY chances of ground loops in audio.
**Has anyone noticed how bad windows handles music + games since hardware mixing died? it is like they have volume leveling even with it OFF. Pop on some music and game and see if you notice game sounds slightly dropping the volume of music. For X-fi users, if you have Winamp, try some of the OpenAL plugins, they 100% fix this issue.
BACK ON TOPIC.
I think for computer speakers you are using your sound card fine. Optical has many advantages(isolation being the big one) and is what I would use if I did not have such needs(space concerns leading to more than one system on the same speakers.).
whooleo :
Sound Blaster X-Fi XtremeMusic (in audio creation mode) with an RCA S/PDIF connection (24-bit 96KHz PCM) to my Denon AVR-487. As far as speakers I'm using 2 Yamaha NS-A100XT's (highly under rated for $300 speakers) and a Polk Audio PSW-10 (LOVE IT!).
Personally I never use "PC desktop" speakers, it's always home theatre equipment for me.
Bet that sounds damn good