wning's description, but we'll get around to an explanation eventually.
</p>

<pre class="indented">
(with-sound () (fm 0 1.0 100 .5 1.0 4.0))
</pre>

<p>is Chowning's first example.  Sure enough, it's a complex spectrum (that is, it has lots of 
components; try an index of 0 to hear a sine wave, if you're suspicious).  Since our modulating 
frequency to carrier frequency ratio (mc-ratio above) is 1.0, we get sidebands at harmonics of the 
carrier. If we use an mc-ratio of .25 and a carrier of 400:
</p>

<p