cascade fm picture">
</td></tr>
<tr><td class="bluishb">osc A: 2000 Hz, osc B: 500 Hz, index 1.5, osc C: 50 Hz, index 1.0</td></tr>
</table>

<!--
cascade.png:

(define (cascade1 beg dur freq amp modfreq modind modpha casfreq casind caspha)
  (let* ((start (seconds->samples beg))
	 (end (+ start (seconds->samples dur)))
	 (cr (make-oscil freq))
	 (md (make-oscil modfreq modpha))
	 (ca (make-oscil casfreq caspha))
	 (fm-ind0 (hz->radians (* modind modfreq)))
	 (fm-ind1 (hz->radians (* casind casfreq))))
    