I found this album somewhat randomly, but love these Aussie guys already. Here's what Pitchfork.com says about this record:
"Flying Microtonal Banana was the product of Gizzard king Stu Mackenzie acquiring a custom-made guitar modified for microtonal tuning, which allows for intervals smaller than the semitones that govern Western music. And since the new guitar could only be played with similarly tuned instruments, he reportedly paid his bandmates $200 each to also get their gear tricked out with microtonal capabilities."
And it weirdly nicely rocks end to end, whether you know the details or not! Enjoy!