[Arny Krueger]

"John Fields" wrote in
message

But that's true only for _modulation_, which is nonlinear
mixing due to time-variable gain.


You can simulate modulation by adding other signals (the sidebands) by means
of linear mixing.

The over all process is nonlinear because new frequencies are added. But,
the process that Dick described fit within my question about linear mixing.
I didn't say that new frequencies couldn't be added.

You're both right as long as you don't say that Dick is wrong, per my
question. ;-)