A friend and I are currently working up some fiddle tunes to improvise on that we can play around town, at open mics, in jazz and country bars, etc. and to that end I've been putting together some simple (lofi) recordings, which have been useful for study and improvement.
This is a simple improv game, the rule for which is essentially a game of hot potato where each person plays precisely 16 measures of music, swapping from lead to accompaniment until the players mutually decide to end (or force the other to end, or just stop playing). I'm on mandolin, my pal Alex is playing a six string guitar.
In this tune (Canadian fiddle classic "Whiskey Before Breakfast) there's a (mostly) known chord progression and (mostly) known core melody, but as you can tell by my breaks going well off the rails, the rules are not strict. Reharmonizing, chord substitution, etc are all possible. I play this one fairly conservatively from a chord standpoint, because in my mind Whiskey Before Breakfast has a really iconic chordal movement that's super familiar throughout North America and other parts of the world, and having that facet be not too adventurous is a useful musical limitation.
Anyway, this is interesting to share because it's messy in a way that most recorded music isn't, but often is in living, spontaneous contexts!