 have a good chance of getting usable results.  
If you want cascade FM to work in other situations, make sure the top oscil has an initial phase of 
(pi + mod-incr)/2.  The middle FM spectrum will then have only sines (not cosines), so the DC component
will be thoroughly discouraged.  Or use phase modulation instead; in that case, we
have effectively <code>(oscil gen 0.0 0.05)</code>, which has no effect on the pitch, but offsets the
phase by a constant (0.05), usually not a big deal.
</p>


<p>The irascib