If you convert to WAVE files, then in your DAW you are just mixing audio.

If you send the MIDI to your DAW, then you must assign a hardware or software MIDI synth to play those tracks in the DAW. This can be good because you may have some great sound synths you like to use. It just takes a little more time to set up within the project. Also, editing of the parts is far easier in MIDI, if that might be needed. Finally, you correctly noted that transferring MIDI will be much faster than audio.


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