This nice little tune is a song by Robert Johnson, 32-20 Blues. I play this song in Open-G here. The common knowledge about this song so far now is that this was played in key of A with regular tuning. But I believe that this song was player in Open-G tuning.The total resonant is far greater when you play it in Open-G than played by regular tuning. In this video, I'm using Open-G with capo at 2nd fret, key of A. Also, it's more comfortable to play in Open tuning, for sure.円熟。
And, of course, you know, Robert can play this tune both in regular and Open-G with exactly the same notes. This is my hypothesis that Robert can play a song in different tunings almost identical way.
Robert Johnson is still mystery...