Originally Posted By: Joe V
That's a nice change Jim - I've noticed that many 'out of key' chord substitutions that work well - and I'm sure there's a musical explanation, - are a b3 away from the previous chord - can anyone shed more light on this pattern ?

For me, the choice was simply because they both had the melody's C note to the chord structure...
Fm would also work... & perhaps other chord structures...

That's the nice thing about Biab...
Once you have the song & melody notated & saved...
You can safely take some time to experiment with reharmonization inserting different chords...


Jim
†=☮&♥