I have just bought a Sony MZ-R70 Minidisc recorder. I'm impressed by the recording and playback quality but surprised by how noisy it is in record and playback mode - it sounds like it is scanning the minidisc. Whilst not a huge problem at the moment I can imagine it would be if I was using a T-microphone plugged directly into the unit. Are they all like this or does it sound as though mine is faulty?

Can anyone suggest a good microphone to buy?

Tim