Thank you Dasfaker
I didn’t see in juce classes the setByte command just setByteRange I couldn’t get it
So I must start with something in a form of CrlrMidiMessage (it could be practicle )
my factory preset are in a table form but not in Hex format but strings (f7) and
it is just the sound bytes not the whole midi message
Deal with memoryblocks andsave when the panel is saved could be nice
I have to do all now
Thank you again