I would appreciate the discrete code for the mute as well as the others.
My other quest is for the ability to switch the AUDIO only component of the DVD Video source. This to to allow video to be set to TV whatever when I listen to dts Audio only CDs. The frustrating thing is the front panel of my Sony STR-DA50ES receiver has a 3 state mode button "V", "A" or both controlling the behaviour of the rotary input selector knob. I have not found any IR codes for this button nor the rotary knob even.
A couple of days ago, I posted to this site a modified version of Geoffrey Reynolds "ProntoUtil v1.2b". Hopefuly it will appear in the "Files > Pronto > Other > Utilities > IR Programs" section soon. I added the ability to generate a CCF version of all the Function codes of a given device number. Cutting and pasting hundreds of codes into CCFPanels was such a bore in my quest for elusive IR commands. Like you, I got stuck on decoding or generating the EQ codes as they do not fit our known 5bit, 8bit or 13bit Sony patterns.