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<DIV><FONT face=Arial size=2>Roland seems like they have a good spring reverb
model in their RV-5. I did a spring reverb emulation last summer at a Banff
workshop, using a few hundred cascaded first-order allpass stages to simulate
the dispersion of the spring. It sounded great, and only took up 70% of a
2.66 GHz Pentium 4! OK, it was not programmed optimally, but even so, using 200+
allpasses is not very efficient.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Check the press releases at the upcoming AES
conference for some spring emulation news (I think - it is not my company that
is working on the emulation, so I don't know when they will make the
announcement). </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>As far as the "boing" when you kick it, you
would probably want an accelerometer in your box with the computer/DSP, and use
that to generate a rounded impulse that gets fed into the reverb input. I don't
think this will make it into the above product, but it has been
discussed.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Sean Costello</FONT></DIV>
<BLOCKQUOTE
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=megaohm1@gmail.com href="mailto:megaohm1@gmail.com">megaohm</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Cc:</B> <A title=synth-diy@dropmix.xs4all.nl
href="mailto:synth-diy@dropmix.xs4all.nl">synth-diy</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, September 14, 2005 1:34
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [sdiy] Analog Modeling, with
a computer!</DIV>
<DIV><BR></DIV>
<DIV>Just curious. Has anyone modelled a reverb tank? I want to be able to get
that boooiiinnngg sound everytime I kick my computer. Perhaps in
the future we could model the actual flow of electrons instead of mere
components. </DIV>
<DIV> </DIV>
<DIV>peng<BR><BR> </DIV>
<DIV><SPAN class=gmail_quote>On 9/14/05, <B class=gmail_sendername>Antti
Huovilainen</B> <<A
href="mailto:ajhuovil@cc.hut.fi">ajhuovil@cc.hut.fi</A>> wrote:</SPAN>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">On
Wed, 14 Sep 2005, Richard Wentk wrote:<BR><BR>> This *will* affect the
sound, often noticeably. So the only way to really <BR>> model a physical
circuit is to replace all the ideal components with nominal<BR>>
R+L+C+noise network models, and then add some extra mostly-C, some R
and<BR><BR>I often hear statements like this, but I've yet to see any of
them backed <BR>up by hard data (such as a listing with values for a typical
poly*<BR>capacitor at audio frequencies). So excuse me, if I remain
skeptical.<BR><BR>Antti<BR><BR>"No boom today. Boom tomorrow. There's always
a boom tomorrow" <BR> -- Lt. Cmdr.
Ivanova<BR></BLOCKQUOTE></DIV><BR></BLOCKQUOTE></BODY></HTML>