I just bought a Pandora PX4B and was shocked with the quality of sounding. It was full of noise when you play with most amps and cabs mode and the recording quality was so terrible which I can not imagine that Korg would release this product to the market. I found that this product is useful only for rythm box which is again just OK. First I thought it was a defected unit so I went back to tried few more but all turn to be the same. Do they re-chip this unit with a upgrade one. Its really hurt me.