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<TT>Ric,</TT><TT></TT>
<P><TT>The harmonic contents of the two signals are quite different: one
"rich" one "plain"; I think you'd get an even more spectacular result with
two like signals. Both of the signal generators you were using probably
don't change their phasing - just turn on and off (my results were different
because I used a synthesizer that starts a "sine" wave from 0 each time).</TT><TT></TT>
<P><TT>Drone-o-rama!</TT><TT></TT>
<P><TT>Clark</TT></HTML>