I listened to the song sample on Mele.com & here's my opinion.Not positive but to my ears it sounds like standard tuning. The song seems to be played in the key of E. I messed with it for a couple of minutes & found that if you tune to "Drop C" aka "Leonard's C" aka "Taropatch G with C bass" (C-G-D-G-B-D) then you capo at the 4th fret. You'll then be in the key of E. The song literally falls off of the guitar.
You start with the 1st position C chord shape from taropatch & slide that shape up one fret (no barre) and back for the intro & "hook" of the song.
The basic vamp will be parallels on the 2nd & 4th strings arpeggiating strings. Sequence doesn't really matter as long as you emphasize the fretted melody notes. (Parallels from capo) are: 10/10-8/9-6/7-5/5-3/3 then back to your home chord.
Wow! I stand in awe that you could suss that out so quickly ... thanks for the master class. I would have been stumbling around. Dunno what that flamenco-sounding chord is, but it really sounds cool.
Hahahaha, John. Mahalo for the kind words. Just a developed skill acquired from the many kanikapila I've attended. I'm always scrambling to figure out how to keep up adequately with whoever is playing an unfamiliar song. Comes in handy when you want to learn songs & there's no tabs or videos available. Glad I could help.