If the information is stored at some value of bits per cm… There’s less bitrate (bits per revolution) in the middle of the record vs the outer edges.
If the information is stored at some value of bits per cm… There’s less bitrate (bits per revolution) in the middle of the record vs the outer edges.
So the arc speed increases as the radius decreases, both in cutting and reading.
Lines and angles and curves, too, I bet.