i have a yamaha p105 no MIDI out has USB TO HOST i thinking about a tc helicon harmony M for live gigs. Any suggestion on how to connect them without a laptop. the harmony has MIDI in
You need a USB Host -> Midi hardware converter.
The Kenton is the only one I'm aware of, though there may be others.
I've never used it personally, so I have no opinion on how well it does the job.