What am I hearing???


~~~~Hello,
I hope someone can explain why on some cd's the long piano notes sound slightly warbled. Not the normal vibration from the piano's wires. Am I hearing laser trying to track info on a non-concentric disc? I noticed a lot of cd's data area slightly non-concentric to edge of disc. Shouldn't the laser be able to trace imperfections? Warranty time? Starting to bug me, RATS!

Just The Facts
By
fbi

Showing 1 response by audioengr

Stehno wrote:
"In essence, a poorly designed cable will produce or generate the exact same (moment in time) musical signal muliple times before the signal completes it's travels to the other end of the cable."

Not quite. Smearing in cables has to do with the dielectric absorption. It is simply charge stored in the cable dielectric that releases more slowly than air would.

Now, transmission-line reflections will cause a digital signal edge to reflect back and forth between the source and destination multiple times if the cable is low-loss.

I would suspect that an audible warble from a CDP is probably bad jitter or WOW from the transport mechanism. The servo is not keeping pace with the rotation.