CD-SPEED Green line vs. Yellow line

When I run NERO CD SPEED I get two lines, one green that stayed flat at 16X and a second, yellow one that trended dwon from 16X to 8X. What do each of the two lines signify?


jcl master

Red: Writing speed measured in 1xCD
Yellow: Use the right scale, not the left one. It’s 1000xrotations/min.