You need a full duplex soundcard. A lot of the consumer end ones are NOT full duplex. Or it could be a configuration issue depending on your hardware. You might check reviews of your card and see if you're not alone in your issue(s). A full duplex card is more common these days, since you need one to converse via webcam or skype. But it's not a given. Always check the specs, specifically for FULL DUPLEX. My M-Audio Delta 44 says FULL DUPLEX on the box. They normally will allow simultaneous in and out, but they both travel on the same wire, or wires that are so close to each other they might as well be the same wire. Hence the bleed from output to input that you're experiencing. Not that that's your issue, but I get that symptom on my laptops integrated soundcard.
Creative Sound Blaster - Sound cards for gaming, movies and music listening
PCI Express Sound Blaster X-Fi Titanium | Creative Labs Online Store
Assuming that you have that version and not the half a dozen others by the same name-ish. It looks like it could be full duplex. Clear(er) chat. Low latency ASIO drivers. You might just be using the wrong driver for it. Or have options to the card in a wrong configuration. I find it funny that it says 5.0 sound, versus the 5.1 that is surround sound. Or that is says clear
er chat, as opposed to clearest. Otherwise on the surface it appears like it might work, according to the propaganda.
Newegg.com - Creative 30SB088200000 7.1 Channels 24-bit 24 bit 96 kHz ADC - Play
24 bit 96 kHz 7.1 Channel DAC - Play
24 bit 192 kHz Stereo DAC - Play
24 bit 96 kHz Recording PCI Express x1 Interface SoundBlaster X-Fi Titan
heh. 5 stars, but this comment:
Cons: The utilities it comes with conflict with Windows and the motherboard's sound card. I had to disable evry output except for the one I use, and then I had to mess with things to get it to work right.
4 stars and this comment:
Other Thoughts: I immediately grabbed the latest drivers from there site and had problems. Went back and noticed there is a Product Identification Module update specifically for Win 7 : ) been fine ever since.
Still no clue as to full duplex or not. The beefier 2x's+ as much version probably is. Yours might be. With ASIO drivers it should be. But per the reviews a PITB to install / configure correctly.