Thanks all, and a quick follow up. I tried swapping out to an old pair of pedals and went down the driveway in my loafers and the noise was still there. I also swapped out to a seatpost/seat from another bike and still had the noise. I road down the driveway and today heard the popping/crackling really ramp up when I stopped pedaling and coasted down the driveway. This is driving me mad! I had the bike completely overhauled in Feb.

If the noise occurs when coasting can it be the BB? If it is the BB, I would think if it would only happen when pedaling.

Thanks, Wilfred for the suggestion about cables. I'll check it out. It does sound like whatever it is it is echoing through the frame.

I'm still going to ride it. Can't be home day after day and not ride.....

Chris