I hate to be the one to brake this bad news to you, tha ASC-10 will not work with your T3,OK hold on don't get mad at me,you might say that you read somewhere that it works with all midi keyboards,actually when Roland made the ASC-10 they missinformed people by that statement,the ASC-10 works perfectly with GS keyboards witch's a Roland format,but if used with a non GS keyboard such as a T3 it will work in what's called a "Bender mode",that means connect the IN of the box to the T3 out and the OUT of the box to the T3 IN, and try it,the MODE button on the box has to be on,your T3 will suddenly become a MONOPHONIC keyboard,try it.

I hope that helped.

Eddy