Thanks Mtrycrafts. maybe I'm thinking at the point of clipping. I read the article and I guess the harmonics depends on the class of amplifier topology used. Most of the time, tubes are used in the class where even order are more prevalent and thus incorrectly get labelled (like I have ) as producing only even order harmonics.
Unless you are doing this stuff on a daily base, I am don't, and do it hands on with instruments, hard to keep track of all the stuff about it
Also, reading other sources, distortion would also depend on single ended, or push-pull types too.
I'd also would like to see the study that shows even order is more pleasing when audible but not clipping


Rather not rely on urban legends and myths

