Hello,
I've been using the filter abstractions from the rjlib, which are all vanilla. Also, they use a an abstraction variant of [biquad~] called [e_beequad] that allows for signal control instead of message. The equations used are also nicely documented within the patches.
.mmb
On Sun, May 17, 2009 at 9:03 AM, brandon zeeb
<zeeb.brandon@gmail.com> wrote:
Derek,
Thanks for the complete list! This is very helpful.
I was hoping to start off by using Vanilla-only objects. Does anyone have some good examples of how [biquad~] can be used to replicate standard low/high/band pass filters w/ q? Any other ideas?
~brandon
On Sun, May 17, 2009 at 4:35 AM, Derek Holzer
<derek@umatic.nl> wrote:
Hi Brandon,
here ya go!
VANILLA PD
*SIGNAL CONTROLLED*
vcf~
moog~
*MESSAGE CONTROLLED*
lop~
bp~
hp~
biquad
PD-EXTENDED/EXTERNAL LIBRARIES
*SIGNAL CONTROLLED*
---IEM Lib filters---
vcf_filter~ (building block for following abstractions)
vcf_bp2~
vcf_bp4~
vcf_bp6~
vcf_bp8~
vcf_hp2~
vcf_hp4~
vcf_hp6~
vcf_hp8~
vcf_lp2~
vcf_lp4~
vcf_lp6~
vcf_lp8~
vcf_rbp2~
vcf_rbp4~
vcf_rbp6~
vcf_rbp8~
*MESSAGE CONTROLLED*
---IEM Lib filters---
filter~ (building block for following abstractions)
bpq2~
bpw2~
bsq2~
hp1~
hp2~
hp2_bess~ (can go from 2-10 order)
hp2_butt~ (can go from 2-10 order)
hp2_cheb~ (can go from 2-10 order)
hp2_crit~ (can go from 2-10 order)
lp1~
lp2~
lp2_bess~ (can go from 2-10 order)
lp2_butt~ (can go from 2-10 order)
lp2_cheb~ (can go from 2-10 order)
lp2_crit~ (can go from 2-10 order)
---GGEE---
(Generate biquad coefficients)
bandpass
highpass
lowpass
Maybe I missed some? ;-)
Best!
D.
brandon zeeb wrote:
Hallo,
How does everyone implement basic resonant filters, ie: LPF, HPF, BPF, in Puredata? [lop~], [hip~], and [bp~] are nice, and can easily be strung serially to create 2nd, 3rd, and 4th order filters, but lack q.
[biquad~] seems up to the task, but I'm unable to find any information in the help file or docs online pertaining to how one could replicate standard filters using this object.
::: derek holzer ::: http://blog.myspace.com/macumbista ::: http://www.vimeo.com/macumbista :::
---Oblique Strategy # 164:
"Twist the spine"
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