According to
post #5 in this thread , UEI setup code Audio 1730 (31730) will work.
That's RC-5
Button name, device (system), function number (command)
0 31 0
1 16 4
2 16 5
3 16 3
4 16 1
5 16 2
6 16 0
vol up 16 16
vol down 16 17
mute 16 13
power 16 14
System 16 is the standard in RC-5 for preamplifiers, and the command numbers are also standard for Vol+/-. Probably the number keys select an input of some sort.
What format do you need to try these?