So if you send this to mp-1 F0 0D 00 08 01 7F 6B F7 (BOX ,ADA ID,midi ch,return command,MP1 ID,all parameters,chsum,EOX)
Then the mp-1 will return 19 bytes
byte 1 ==> F0 (sysex start)
byte 2 ==> 0D (ADA ID)
byte 3 ==> midi channel (ch1 =00h ch16 0Fh)
byte 4 ==> 09 send parameter command
byte 5 ==> 01 (MP-1 ID)
byte 6 ==> 7F (all parameters)
byte 7 ==>OD1 (00h - 28h)
byte 8 ==>OD2 (00h - 28h)
byte 9 ==>Master (00h - 1Ch)
byte 10 ==>Bass (00h - 0Ch)
byte 11 ==>Mid (00h - 0Ch)
byte 12 ==>Treble (00h - 0Ch)
byte 13 ==>Pres (00h - 0Ch)
byte 14 ==> effectloop (00h=off 01h=on)
byte 15 ==>Chorus Depth (00h - 64h)
byte 16 ==>Chorus Rate (00h - 64h)
byte 17 ==>Voicing (00h=S.S. 01h=T.D. 02h=T.C.)
byte 18 ==>Checksum
byte 19 ==>F7 (EOX)
So byte 1 to byte 6 should be left the same,then you can alter byte 7 to byte 17, put the new checksum in byte 18 leave byte 19 like it is and if you send these back to the MP-1 it should take over the new settings.(you will see LoAdinG on the display)
Then you can alter the preset nr (if you want) and press store.