Converting MIDI to DMF is rarely a "one-click" perfect process due to the technical differences between MIDI and chiptune: DMF File Extension - What is .dmf and how to open?
python midi2dmf.py input.mid output.dmf --chip genesis midi to dmf new
Assign each MIDI channel to a specific tracker channel (e.g., Channel 6 often defaults to DAC/drums). Final Polish in DefleMask Open the generated Assign Instruments Converting MIDI to DMF is rarely a "one-click"