> Another option is to use a small USB sound device. My headphones came > with one, for example. They can be really nice for reducing electrical > noise in the capture channel, too. > > They also occasionally crop up where you might not expect them. I > picked up an HP 'travel' USB hub some time back, and was surprised to > discover it had a built-in NIC, mic input and stereo out.
Yeah, correct me if I'm wrong, but those usually have built in echo cancellation. Most usb speaker/mic combos do. I believe I'm relying on software in my case.