In the course of a discussion with Alexandre I ran into something really interesting: [delread~] and [vd~] have different delay limits! While [delread~] has always the buffersize minus the blocksize of the subpatch where it is located, the limit of [vd~] is 64 samples greater. Any explanations?
In my example patch, simply choose any blocksize, then set the delay time to maximum 100 (which is actually beyond the maximum), and then toggle between [vd~] and [delread~] to see the 64 samples difference...
#N canvas 108 235 1541 619 10; #N canvas 643 87 725 364 subpatch 1; #N canvas 154 251 450 300 delwrite 0; #X obj 94 94 inlet~; #X obj 98 196 outlet~; #X obj 102 143 delwrite~ \$0-del 100; #X connect 0 0 2 0; #X restore 84 86 pd delwrite; #N canvas 149 132 450 300 delread 0; #X obj 99 77 inlet~; #X obj 94 192 outlet~; #X obj 94 118 r \$0-time; #X obj 93 146 delread~ \$0-del; #X connect 2 0 3 0; #X connect 3 0 1 0; #X restore 73 127 pd delread; #X obj 71 -8 inlet; #X obj 56 250 tabwrite~ \$0-plot; #X obj 320 208 block~ 64; #X msg 322 161 set \$1; #X obj 336 42 r \$0-blocksize; #X obj 383 84 t f b; #X obj 415 109 samplerate~; #X obj 412 181 /; #X obj 418 133 / 1000; #X obj 419 221 s \$0-blocksize_ms; #X msg 129 26 0; #X obj 84 51 osc~ 10; #X obj 223 99 s \$0-plot; #X obj 217 43 loadbang; #X msg 221 72 xticks 0 64 1; #N canvas 149 132 450 300 vd 0; #X obj 99 77 inlet~; #X obj 94 192 outlet~; #X obj 94 118 r \$0-time; #X obj 93 147 vd~ \$0-del; #X connect 2 0 3 0; #X connect 3 0 1 0; #X restore 100 162 pd vd; #X obj 67 208 *~; #X obj 115 208 *~; #X obj 164 146 r \$0-toggle; #X obj 164 180 == 0; #X msg 180 110 0; #X connect 0 0 1 0; #X connect 0 0 17 0; #X connect 1 0 18 0; #X connect 2 0 3 0; #X connect 2 0 12 0; #X connect 5 0 4 0; #X connect 6 0 7 0; #X connect 6 0 5 0; #X connect 7 0 9 0; #X connect 7 1 8 0; #X connect 8 0 10 0; #X connect 9 0 11 0; #X connect 10 0 9 1; #X connect 12 0 13 1; #X connect 13 0 0 0; #X connect 15 0 16 0; #X connect 15 0 22 0; #X connect 16 0 14 0; #X connect 17 0 19 0; #X connect 18 0 3 0; #X connect 19 0 3 0; #X connect 20 0 21 0; #X connect 20 0 18 1; #X connect 21 0 19 1; #X connect 22 0 21 0; #X restore 112 201 pd subpatch; #N canvas 0 50 450 250 (subpatch) 0; #X array \$0-plot 4410 float 2; #X coords 0 1 4410 -1 1000 140 1 0 0; #X restore 20 302 graph; #X obj 25 240 s \$0-blocksize; #X msg 24 69 64; #X msg 26 93 128; #X msg 30 118 256; #X msg 32 142 512; #X msg 35 163 1024; #X msg 39 184 2048; #X msg 43 206 4096; #X text 132 268 ms; #X obj 148 151 nbx 5 14 0 100 0 0 \$0-time empty delay_time 0 -8 0 10 -262144 -1 -1 100 256; #X obj 112 177 bng 15 250 50 0 empty \$0-toggle empty 17 7 0 10 -262144 -1 -1; #X text 131 176 click me; #X floatatom 92 270 5 0 0 0 blocksize: #0-blocksize_ms -, f 5; #X text 107 148 set:; #X text 224 156 buffersize (100 ms) - blocksize; #X text 222 136 maximum delay time for [delread~] =; #X text 17 451 (ticks are every 64 samples); #X obj 232 208 tgl 15 0 \$0-toggle empty empty 17 7 0 10 -262144 -1 -1 0 1; #X text 251 208 toggle between [vd~] and [delread~]; #X connect 3 0 2 0; #X connect 4 0 2 0; #X connect 5 0 2 0; #X connect 6 0 2 0; #X connect 7 0 2 0; #X connect 8 0 2 0; #X connect 9 0 2 0; #X connect 12 0 0 0;
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