ommunications Systems", McGraw-Hill, 1986.

Tomisawa, "Tone Production Method for an Electronic Musical Instrument" US Patent 4,249,447, 1981.

Watson, "A Treatise on the Theory of Bessel Functions", Cambridge, 1922.
</pre>


<table class="spaced">
<tr><td>
<table><tr><td>
<img src="pix/fmradio.png" alt="early FM radio">
</td></tr>
<tr><td class="bluishb">FM (and AM) radio ca 1934
</td></tr></table>

</td><td>

<table class="spaced">
<tr><td>
<img src="pix/m5fm1.png" alt="music v source"><br>
<img src="pix/