Check the 'cyclone' lib, it has Max clones. I think there is at least
one other reson~ included in Pd-extended.
.hc
On Mar 9, 2010, at 5:08 PM, Björn Lindig wrote:
Hi,
a friend asked me, wether there is a object similar to the [fffb~]
in max/msp (a "fast fixed filter bank") in pd. I did not find it instantly so I
started to build one after the formula posted in [reson~]s help in max:y[n] = gain * (x[n] - r * x[n-2]) + c1 * y[n-1] + c2 * y[n-2]
I appended a patch, that I created after this formula. The Problem
is, that I would love to klone the max-object, but at the moment I have only
inlets for r, c1, c2 and gain. What I need is the math to calculate the values
for r, c1, c2 and gain for given center frequency, Q/Bandwith, and gain.I started reading the chapters on time shifts and delays and filters
in miller-puckettes book and the book of J. O. Smith. But to be honest,
I did not yet understand much of what is writen there. So I thought, there
might be someone arround here, who can give me a fast answer, or who can
point me into the right direction.If it is the best to try resonz and resonr (I'm on train building pd- extended, used vanilla before), I'll accept that. On the other hand, I would
be realy curious about the math that is used to solve this problem.Thank you very much!
Bjoern
#N canvas 611 38 615 510 10; #X obj 105 -13 inlet~; #X obj 105 394 outlet~; #X obj 153 218 delwrite~ del3; #X obj 125 348 delwrite~ del2; #X obj 105 121 +~; #X obj 104 239 +~; #X obj 104 320 +~; #X obj 125 99 *~; #X obj 122 218 *~; #X obj 138 299 *~; #X obj 239 -10 inlet~; #X text 239 -27 r; #X obj 307 -10 inlet~; #X obj 383 -7 inlet~; #X text 303 -33 c1; #X text 389 -26 c2; #X obj 124 14 delwrite~ del1 1; #X obj 125 78 delread~ del1; #X obj 123 198 delread~ del2 1; #X obj 138 278 delread~ del3 1; #X obj 427 134 samplerate~; #X msg 387 134 1; #X obj 387 155 /; #X obj 387 91 loadbang; #X floatatom 387 198 0 0 0 0 - - -; #X obj 387 112 t b b; #X obj 387 176 * 1000; #X obj 387 221 s one_sample; #X obj 125 34 r one_sample; #X obj 125 55 * 2; #X obj 131 177 r one_sample; #X obj 147 254 r one_sample; #X obj 105 150 *~; #X obj 455 -4 inlet~; #X text 456 -22 gain; #X connect 0 0 4 0; #X connect 0 0 16 0; #X connect 4 0 32 0; #X connect 5 0 6 0; #X connect 6 0 1 0; #X connect 6 0 3 0; #X connect 7 0 4 1; #X connect 8 0 5 1; #X connect 9 0 6 1; #X connect 10 0 7 1; #X connect 12 0 8 1; #X connect 13 0 9 1; #X connect 17 0 7 0; #X connect 18 0 8 0; #X connect 18 0 2 0; #X connect 19 0 9 0; #X connect 20 0 22 1; #X connect 21 0 22 0; #X connect 22 0 26 0; #X connect 23 0 25 0; #X connect 24 0 27 0; #X connect 25 0 21 0; #X connect 25 1 20 0; #X connect 26 0 24 0; #X connect 28 0 29 0; #X connect 29 0 17 0; #X connect 30 0 18 0; #X connect 31 0 19 0; #X connect 32 0 5 0; #X connect 33 0 32 1;
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