).  By using a few sines in the modulator, you 
get away from the simple FM index sweep that has become tiresome, and the broader, flatter spectrum 
is somewhat closer to that of a real violin.
A pared down version of the fm-violin is:
</p>


<!-- CLM CASE 
<pre class="indented">
(definstrument violin (beg dur frequency amplitude fm-index)
  (let* ((start (seconds-&gt;samples beg))
         (stop (+ beg (seconds-&gt;samples dur)))
         (frq-scl (hz-&gt;radians frequency))
         (maxdev (* frq-scl fm-