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<DIV><FONT face=Arial size=2>i am creating an affordable/free series of
physically modeled instruments in VST format.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>i'm modeling aerophone bell flares with a banded
waveguide like structure, filtering and applying a short delay derived
from the partial's frequency.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>
<DIV><FONT face=Arial size=2>presently the delay applied to each band is
simply</FONT></DIV>
<DIV><FONT face=Arial size=2>(frequency of partial / nyquist) * bell
delay coefficient (~3-7ms)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>so that the partials have an increasingly larger
delay in ascending order. </FONT><FONT face=Arial size=2>i also tried an "octave
unit/linear" spacing of band delay times which sounded less convincing (a hard
call given the abstract nature of the method).</FONT></DIV>
<DIV> </DIV>
<DIV>do any improvements seem obvious to this technique to those who have
reviewed more data?</DIV></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>the behaviours beyond my knowledge reduce the
tuning beyond the appreciability for those inexpert users who lack
functional continuous pitch controllers, i like to think modeled instrumentation
is informationally sensitising to the composer.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>are there other elementary methods of
bell modeling i should be exploring instead? i lack education above
trigonometry.. my experimentations have encountered cascade
behaviours that elicits the utility of short periodic switching julius
describes for stabilising TIIRs, i was not able to estimate which IIR
filter he intended (my erudition has</FONT><FONT face=Arial
size=2> only recently surmised the calculation of damping filter phase
to pitch correction in a karplus-strong circuit..).</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>rurik.</FONT></DIV>
<DIV><FONT face=Arial size=2><A
href="http://www.xoxos.net">http://www.xoxos.net</A></FONT></DIV></BODY></HTML>