So I got my ZXR a few weeks ago, and have only now begun to test it fully. It's FANTASTIC on the playback side of things, but I've just tried the microphone input and it's ridiculously hissy. Tried the included mic as well as an additional one - no difference. There's constant static!
To be honest I find this quite unbelievable considering this is a top of the range card, so I'm posting here to ask other owners if it's considered normal or not. It's a £200 sound card so I'd EXPECT it to have a half decent mic input.
Here's a sound sample: