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<DIV>You can use what is called a twin T filter that is near oscillation. When
<BR>you apply a little pulse to the input the filter rings for a while and
<BR>sounds like an electronic drum.<BR><BR>Here are some links.<BR><BR><A
href="">http://www.paia.com/syndrum.htm</A><BR><A
href="">http://www.cgs.synth.net/modules/cgs18_drum.html</A><BR><A
href="">http://www.radio-electronics.com/info/circuits/rc_notch_filter/twin_t_notch_filter.php</A><BR><BR>Cheers<BR><BR>Ray<BR></DIV>
<DIV><FONT face=Arial size=2>(Sorry for the copy...)</FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=seph@nemesis.com.au href="mailto:seph@nemesis.com.au">woody</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=synth-diy@dropmix.xs4all.nl
href="mailto:synth-diy@dropmix.xs4all.nl">synth-diy@dropmix.xs4all.nl</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, June 08, 2005 12:32
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [sdiy] analog drum machine
parts</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Hey,</FONT></DIV>
<DIV><FONT face=Arial size=2>I've got an old fafisa organ with an analog drum
box tack on the side</FONT></DIV>
<DIV><FONT face=Arial size=2>Are they useful for parts for anyone doing that
stuff?</FONT></DIV>
<DIV><FONT face=Arial size=2>Beyond that are any of the parts for the organ
useful?</FONT></DIV>
<DIV><FONT face=Arial size=2>greg</FONT></DIV></BLOCKQUOTE></BODY></HTML>