Interesting project!
This might be of some help:
http://www.jososoft.dk/yamaha/pdf/Beggar_SysExGuide.pdf(although it's only specifically for Yamaha DB-50XG daughter boards).
--- In AN1x-list@yahoogroups.com, "twobeelandscape" <bill@...> wrote:
>
> Bruno, thank you very much. Now you have pointed it out, it seems obvious that a dump request with a specific address would return the parameter value for that address - although not so obvious that the data list/manual would bother to explicitly state it! My slight concern is that the H/M/L addresses referred to might be only Data Table <1-1>, the bulk dump types, rather than Table <1-2>, the Parameters.
>
> Tonight, I will set up some tests in MIDI-OX to see if a Parameter request returns anything, then try to set up the request/parameter setting in TB MIDI Stuff. Many thanks again for you help - I'll report back.