hi Bob
here is a patch showing one way to do this with the "key" object.. the key object help files will explain further..
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#N canvas 0 0 452 302 10; #X obj 206 44 key; #X floatatom 206 71 5 0 0 0 - - -; #X text 67 70 type on the keyboard , the number which appears here is the key number; #X obj 271 158 select 122; #X obj 271 218 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1 -1; #X text 27 141 select boxes using the key numbers allow bangs to be sent to different objects (e.g to play sound); #X text 342 160 select z key; #X connect 0 0 1 0; #X connect 1 0 3 0; #X connect 3 0 4 0;