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<DIV><FONT face=Arial size=2>Actually the 303 filter does not have a very high Q
at all, it can not self oscillate like the moog ladder, the squelchiness is
caused by the envelope sweeping (or as is popularly called "spanking") the
Q (amongst other things). The thing with the 303 that sets it apart from
everthing else is the quirkiness of the design, there are a lot of "flaws" which
cause it to behave in certain ways. I love the sound personally, since it
is SO different from conventional synth design, hence the reason why it is
VERY difficult to emulate the 303 successfully using another synth.</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=dustin.sedlacek@gmail.com
href="mailto:dustin.sedlacek@gmail.com">dustin sedlacek</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=harrybissell@prodigy.net
href="mailto:harrybissell@prodigy.net">harrybissell</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Cc:</B> <A title=pfperry@melbpc.org.au
href="mailto:pfperry@melbpc.org.au">Paul Perry</A> ; <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> Tuesday, September 06, 2005 8:58
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [sdiy] What is filter
squelch?</DIV>
<DIV><BR></DIV>i thought that this had something to do with the "Q" of a
filter .... i think ... that the "Q" of the filter on the 303 is higher
than then typical moog ladder filter .... John Blacet has a filter
called the "filthy filter" and it is describes as having a lot of "Q"
<A
href="http://www.blacet.com/">http://www.blacet.com/</A><BR><BR> ....here
is a quote from this page<BR> <A
href="http://www.adp-gmbh.ch/csound/filters.html">http://www.adp-gmbh.ch/csound/filters.html</A><BR>"The
filter's Q is a measure of the filter's <I>sharpness</I>. As the Q increases,
so does the sharpness of the filter.
<DIV class=txt>Low pass and high pass filters exhibit a hump for increasing Q
around the cut off frequency for increasing Qs. If the Q is even larger, those
humps turn into peaks. If the Q is too high, it turns the filter into an
oscilator."<BR><BR> seems like i recal reading that a filters's "Q" had a
width but i am not as knowledgeable as others on this list
<BR></DIV><BR><BR><BR>-Dustin<BR><BR><BR><BR><BR><BR>
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