Hi Bob,

It looks like you'd need to record the MIDI notes into the HR-16 in real time, no way to just import a MIDI file.

I found some instructions here:

http://community.alesis.com/alesis/topics/how-can-i-download-record-a-midi-file-from-my-computer-onto-my-alesis-sr-18

https://www.harmonycentral.com/forum/forum/Keyboards/acapella-18/347029-

Thanks
Kent
PG Music