both cases involve a
modulating signal made up of 6 equal amplitude harmonically related sinusoids, but the first uses all cosines, and the second uses a
set of initial phases that minimizes the modulating signal's peak amplitude:
</p>

<img src="pix/fmpar6.png" alt="comparison of 2 6-sinusoid spectra">


<!--
(with-sound (:clipped #f :statistics #t :channels 4 :srate 441000)
  (let* ((freq 100.0)
	 (n 6)
	 (mods1 (make-vector n #f))
	 (mods2 (make-vector n #f))
	 (car1 (make-oscil freq))
	 (car2 (make-osci