The Band's Keyboard Puzzle Mystery Cache

So I was in Houston and my buddy was playing music.  I asked him if he could record something for me.  So I gave him some info and he was able to give me this sound.  So what you are hearing is 6 chords.  There are 3 and then a brief break and then 3 more chords.  So for this one there are the Major and then there are the minor chords.  Just for reference a - g Major and then a - g minor chords.  Cache is not at posted coordinates but is at N43 06.ABC W077 24.DEF. You need to watch the video and just listen to the sounds.  The photos don't mean anything.  Please read attributes and be safe and have some fun.

Some attributes may or may not come into play. But I put them there because of worst case scenario and to cover the bases.

You can validate your puzzle solution with certitude.