That was just an example of a discrete code that I got off of this web site that was then "translated" into Pronto HEX. That one works, but the discrete code for LOUDNESS from the same source does not work.

I was guessing that since this button doesn't work that Pioneer must have reworked some of their buttons on the newer VSX-D812K and 912K to use high frequency, but it's only a guess.

Here is the Discrete code posted on remote central for the Pioneer LOUDNESS button that does not work (even though the Discrete posted for power does)

0000 006d 0000 0022 0155 00ac 0015 0040 0015 0015 0015 0040 0015 0015 0015 0015 0015 0040 0015 0015 0015 0040 0015 0015 0015 0040 0015 0015 0015 0040 0015 0040 0015 0015 0015 0040 0015 0015 0015 0015 0015 0015 0015 0040 0015 0015 0015 0015 0015 0015 0015 0040 0015 0015 0015 0040 0015 0040 0015 0015 0015 0040 0015 0040 0015 0040 0015 0015 0015 0040 0015 0594

Here is what the Pronto simplifies or interprets

900B 006D 0000 0001 A55A 44BB

And here is what my Pronto remote learned from the Pioneer remote.

0000 0063 0000 0044 0161 00B2 0016 0041 0016 0016 0016 0041 0016 0016 0016 0016 0016 0041 0016 0016 0016 0041 0016 0016 0016 0041 0016 0016 0016 0041 0016 0041 0016 0016 0016 0041 0016 0016 0016 0041 0016 0041 0016 0041 0016 0041 0016 0041 0016 0016 0016 0016 0016 0041 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0041 0016 0041 0016 0016 0016 0423 0161 00B2 0016 0041 0016 0016 0016 0041 0016 0016 0016 0016 0016 0041 0016 0016 0016 0041 0016 0016 0016 0041 0016 0016 0016 0041 0016 0041 0016 0016 0016 0041 0016 0016 0016 0041 0016 0041 0016 0016 0016 0041 0016 0016 0016 0016 0016 0041 0016 0041 0016 0016 0016 0016 0016 0041 0016 0016 0016 0041 0016 0041 0016 0016 0016 0016 0016 0423

Does this last one look like it's high frequency?

None of them work, and I've tried getting the code off older Pioneer receivers from Pronto configuration files without success.