[maxmsp] .wav synchronization

Hi all,
 
I would like to synchronize a big number of .wav files. 
A maximum of 6 files should be play at the same time, but every sound can change at any time by appealing has a bank of sounds.
When a sample change, it's must be synchronize with all others.
 
I build this patch for do this with 2 samples.
It's work, but The first one has some milisecondes beforehand on the second.
 
Thanks for your attention.
++ 
 
 
max v2;#N vpatcher 149 181 974 571;#P window setfont "Sans Serif" 12.;#P comment 138 54 119 9109516 1. open 2 sound files;#P window setfont "Sans Serif" 9.;#P newex 495 249 44 9109513 loadbang;#P user number~ 282 310 384 325 9 139 3 2 0. 0. 0 0. 250 0. 0 0 0 221 221 221 222 222 222 0 0 0;#P comment 281 332 100 9109513 current position(ms);#P message 229 76 28 9109513 open;#P message 157 76 28 9109513 open;#P window setfont "Sans Serif" 12.;#P comment 321 54 119 9109516 2. Synchronization;#P window setfont "Sans Serif" 9.;#P comment 749 93 61 9109513 speed;#P flonum 748 109 35 9 0 0 0 139 0 0 0 221 221 221 222 222 222 0 0 0;#P button 655 132 15 0;#P comment 683 90 61 9109513 length;#P newex 549 200 68 9109513 speedlim 100;#P flonum 683 109 62 9 0 0 0 139 0 0 0 221 221 221 222 222 222 0 0 0;#P newex 664 156 38 9109513 + 500.;#P message 622 156 35 9109513 set \$1;#P button 549 182 15 0;#P flonum 613 109 64 9 0 0 0 139 0 0 0 221 221 221 222 222 222 0 0 0;#P newex 622 180 94 9109513 pack 0. 0. 1.;#P message 321 75 14 9109513 2;#P message 622 201 104 9109513 preload 2 \$1 \$2 1 \$3;#P comment 614 90 61 9109513 start;#P user number~ 129 309 231 324 9 139 3 2 0. 0. 0 0. 250 0. 0 0 0 221 221 221 222 222 222 0 0 0;#P comment 128 331 100 9109513 current position(ms);#P toggle 211 78 15 0;#P toggle 140 78 15 0;#P newex 49 37 45 9109513 loadbang;#P newex 49 58 27 9109513 + 75;#P toggle 225 171 15 0;#P message 225 189 41 9109513 loop \$1;#P newex 58 227 50 9109513 / 100.;#P user uslider 61 81 18 128 100 1 0 0;#P newex 337 276 28 9109513 *~ 4.;#P newex 295 276 28 9109513 *~ 4.;#P newex 225 148 44 9109513 loadbang;#N sfplay~  2 60000 2 ;#P newobj 295 232 93 9109513 sfplay~ 2 60000 2;#B color 5;#P newex 189 276 28 9109513 *~ 4.;#P newex 147 276 28 9109513 *~ 4.;#N sfplay~  2 60000 2 ;#P newobj 157 232 93 9109513 sfplay~ 2 60000 2;#B color 5;#P comment 21 87 39 9109513 Volume;#P message 563 271 27 9109513 stop;#P message 495 271 65 9109513 startwindow;#P newex 511 307 42 9109513 dac~;#P connect 16 0 15 0;#P connect 11 0 12 0;#P connect 15 0 11 0;#P fasten 4 2 20 0 202 269 134 269;#P fasten 4 0 5 0 162 263 152 263;#P connect 13 0 4 0;#P fasten 36 0 4 0 162 168 162 168;#P fasten 17 0 4 0 145 168 162 168;#P fasten 12 0 5 1 63 260 170 260;#P fasten 4 1 6 0 182 263 194 263;#P fasten 12 0 6 1 63 260 212 260;#P connect 8 0 14 0;#P connect 14 0 13 0;#P fasten 7 2 39 0 340 269 287 269;#P fasten 18 0 7 0 216 127 300 127;#P fasten 37 0 7 0 234 126 300 126;#P fasten 23 0 7 0 326 230 300 230;#P fasten 22 0 7 0 627 225 300 225;#P connect 13 0 7 0;#P fasten 7 0 9 0 300 263 300 263;#P fasten 12 0 9 1 63 260 318 260;#P fasten 7 1 10 0 320 263 342 263;#P fasten 12 0 10 1 63 260 360 260;#P connect 40 0 1 0;#P hidden fasten 1 0 0 0 500 299 516 299;#P hidden fasten 2 0 0 0 568 299 516 299;#P fasten 9 0 0 0 300 303 516 303;#P fasten 5 0 0 0 152 303 516 303;#P fasten 10 0 0 1 342 303 548 303;#P fasten 6 0 0 1 194 303 548 303;#P fasten 29 0 26 0 688 127 554 127;#P fasten 25 0 26 0 618 126 554 126;#P fasten 33 0 26 0 753 126 554 126;#P connect 26 0 30 0;#P fasten 20 1 25 0 226 361 618 361;#P connect 25 0 27 0;#P connect 27 0 24 0;#P fasten 30 0 24 0 554 176 627 176;#P connect 24 0 22 0;#P fasten 29 0 32 0 688 129 660 129;#P connect 32 0 28 0;#P fasten 25 0 28 0 618 151 669 151;#P connect 28 0 24 1;#P connect 29 0 28 1;#P fasten 33 0 24 2 753 152 711 152;#P pop;
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