hi

by 'slow rate' i am altering the 'transmit speed' in Sysex librarian.

I have now managed to get my Mackie C4 Pro to talk to my oberheim Matrix 1000 with sysex messages so there is no problem with the port.  I have spent the best part of a day coming up with a way to route and merge midi so i can use the C4 Pro to control the oberheim.  I'll set all this aside and have another go with sending patch data later today.

Many thanks for the suggestions and i will check the device ids and sysex headers

Regards

R