I recently purchased a refurbished Canon HG10 and was very happy until I put the first video clips onto my MacBook and the audio had a horrible hissing noise in the background. Also, I could hear the HDD and the auto focus noises in the audio. I understand that consumer camcorders don't exactly have the best audio quality, but this is beyond that. I'm wondering if I should return it or swap it for another one. If anyone has an HG10 and can comment on the audio that'd be great.