hi, i'm not sure where that MIDI options are stored: Keyb.Chn. T/A Split Midd.Note Merger IN OUT Src.Chn.->Dst.Chn. MIDI Clock # 4 off C-3 off Int. IIC1 --- --- on I changed the Keyb.Chn. several times and i have stored the FLASH and EEPROM via midi-sysex: FLASH F0 00 00 7E 40 00 01 00 00 10 00 F7 EEPROM F0 00 00 7E 40 00 01 20 00 00 20 F7 If i send the *.syx back to MBSEQ --> that Keyb.Chn. doesn't changed. I don't get it :