On 03/10/12 15:22, Claude Heiland-Allen wrote:
On 02/10/12 16:15, Miller Puckette wrote:
1. there's a bug in hip~ - its DC gain is slightly (and possibly
considerably)
greater than 1.
Did you mean nyquist-frequency rather than DC here?
See attached test patch that waits 10 seconds for settling to steady
state (extreme overkill no doubt), at 48k sample rate the nyquist gain
for hip~ goes up dramatically as you increase the cutoff...
IIRC DC gain for hip~ should be 0 or very close to it
verified.
and nyquist-frequency gain 1.
here is the bug, these get much louder than the -1 1 -1 1 input
hip10:
-1.0007 1.0007 -1.0007 1.0007 -1.0007 1.0007 -1.0007 1.0007
hip100:
-1.0066 1.0066 -1.0066 1.0066 -1.0066 1.0066 -1.0066 1.0066
hip1000:
-1.07 1.07 -1.07 1.07 -1.07 1.07 -1.07 1.07
hip10000:
-2 2 -2 2 -2 2 -2 2
Claude
--
http://mathr.co.uk
#N canvas 16 47 662 391 10;
#X obj 52 65 loadbang;
#X obj 54 152 delay 10000;
#X obj 95 224 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144 -1
-1;
#X obj 302 236 hip~ 1000;
#X msg 70 88 \; pd dsp 1;
#X obj 137 78 tabplay~ \$0-fizz;
#X obj 139 56 bang~;
#X obj 228 199 table \$0-fizz 64;
#X obj 165 194 s \$0-fizz;
#X msg 164 126 0 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1
-1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1
1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1
-1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1;
#X obj 302 257 print~ hip1000;
#X obj 397 236 hip~ 100;
#X obj 399 257 print~ hip100;
#X obj 495 239 hip~ 10;
#X obj 497 260 print~ hip10;
#X obj 149 237 hip~ 10000;
#X obj 149 258 print~ hip10000;
#X connect 0 0 4 0;
#X connect 0 0 1 0;
#X connect 0 0 9 0;
#X connect 1 0 10 0;
#X connect 1 0 12 0;
#X connect 1 0 14 0;
#X connect 1 0 16 0;
#X connect 2 0 10 0;
#X connect 2 0 12 0;
#X connect 2 0 14 0;
#X connect 2 0 16 0;
#X connect 3 0 10 0;
#X connect 5 0 3 0;
#X connect 5 0 11 0;
#X connect 5 0 13 0;
#X connect 5 0 15 0;
#X connect 6 0 5 0;
#X connect 9 0 8 0;
#X connect 11 0 12 0;
#X connect 13 0 14 0;
#X connect 15 0 16 0;
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