My computer hum was the one that worried me but it doesn't seem to have affected what I've recorded so far. Someone suggested wrapping the thing in foam making sure the fan was not blocked but it didn't make any difference when I tried that. The stereo mic seem to pick up only what is in front of it. I could use it to record a band in one take I'm told. Dont think I could fit a band into my study but I might give it a go one day when I've had more recording experience.