[sdiy] OT: Scratchy CDs

[john mahoney]

> Ken Pohlmann "Principals of Digital Audio" book is a GREAT place to start.

It's on my wish list. As in, I wish I had time to read it. <G> Actually, it
is on my Amazon wish list. (I think Ken's from my neck of the woods, Miami.)


> CD players are truly amazing feats of engineering. For example, the disc
changes speeds about 6
> times a *second* as it spins. Only like 34% of the data on a CD is audio,
the rest is error
> correction/timing.

Paul, are you sure you don't mean that there are 6 different rotational
speed zones on an entire disk? I must say, I have a hard time believing that
a tiny, low torque, battery powered motor can change the speed of a disc
like that. Even rotating at "only" around 300 RPM, that's still a lot of
inertia.
--
john