Found my way here via Roland Clan and bwalk.com.au. Love the MIDI Tools application by the way!
I'm writing a puredata script to try and change the parameters on my old BOSS ME5 effects unit. (The MIDI Tools app has come in very handy!)
I'm succesfully connecting to the unit, sending some sysex and getting changes in the sounds.
I can't quite follow the notes in the ME5 manual though. I think I've got the header part of it correct - F0 41 00 1F 12 ....
And I've setup the script to generate the correct checksum.
Would you mind helping me a little to decipher the address mapping of the parameters?