Does any one have this disc? I have just played it for the first time and am stunned at the clarity and fidelity compared to playing it on mono or stereo LP or quad 8-track. But I have a question to those who have it. Is there strange sub-harmonics in the recording? I started hearing strange sounds like the rumble you hear just before an 8-track changes tracks. It started around 17 minutes in, and then I heard other sounds like someone rolling a cart upstairs. Otherwise I love this disc and will retire at least the LP, except for reference, perhaps. I can't complain much as it was about $7US plus shipping, and I have had worse sounding media for more money. I am hoping it is that they transferred the original tape with no alterations rather than adding to it to cause these noises.