I've posted about this to the electro-music forum: http://electro-music.com/forum/viewtopic.php?p=402793 In trying to write some code for the Illucia dtr, I found that adding addresses to an OscIn object appeared not to work after twelve addresses. I wrote a test program that wasn't illucia-specific; the following code starts 16 OSC transmitters and 16 receivers. When you run it, you can see that transmitters 0-15 all transmit, but only receivers 0-11 receive. for ( 0 => int i ; i < 16 ; i++ ) { spork ~ output(i); spork ~ input(i); } while ( true ) { 1::second => now; } fun void output(int number) { 12008 => int port; "localhost" => string hostname; OscOut xmit; xmit.dest(hostname, port); while (true) { Math.random2f(5.5, 8.5) => float wait; wait::second => now; xmit.start("/tester/what/" + number); Math.random2f(0.0, 1.0) => float temp => xmit.add; xmit.send(); <<< "sent", number, temp >>>; } } fun void input(int number) { OscIn oin; OscMsg msg; 12008 => oin.port; oin.addAddress("/tester/what/" + number + ", f"); float val; while (true) { oin => now; while ( oin.recv(msg) != 0 ) { msg.getFloat(0) => val; <<< "received", number, val >>>; } 5::ms => now; } } I'm running ChucK 1.3.4 on Mavericks, with and without miniAudicle.