Your Korg D1600 is very similar to the older Yamaha AW16G and the Yamaha AW1600 units. You can export files via CD to computer. If it ain't broke....use it to record yourself.
For years, whenever I re-string any of my acoustic guitars I push the string through the turn post and cut the string 3" beyond the turn post. Push the string back by 2-1/2" and begin winding. Too few wraps round the turn post can be problematic....or so I've learned (on my own) and read. Works...
I've listened to Guitar A and Guitar B mp3 files many times.. Guitar A mp3 file certainly does possess a low tone belllike overtone to it that quickly tapers off and then (all of sudden) we hear a pronounced higher pitched resonance or echo at a higher frequency. That can happen whenever a...
I'm glad you read the Martin guitar forum thread, and I agree that the discussion there was inconclusive, however, I still recommend it that you visit AGF for additional responses and suggestions. Everyone here (myself included) desires it that you find a solution in the near future.
And NOW (according to your latest posts) you're attempting to convince yourself (and other people) that it's the B string (not the G string) that is the root cause of all your resonant woes.
You should also consider registering and posting at https://www.acousticguitarforum.com/forums/
Whenever I watch YouTube videos of famous or infamous guitar players I find myself looking at their guitar straps. Some straps are meh, but some straps are works of art.
If you have a great looking strap, post a pic.