I remember that one. Didn't struggle with any of the other flute challenges but that one took forever. Not helped by being a bit janky to begin with but when you're having to switch back & forth between notes with a space in between it just gets awkward.
F-Zero GX. Maybe I'm just bad at it but I never made it past the 3rd mission or something really early on in the game.
For casual play the races can be fun but for the story mode: Way too hard