Twitch Plays Pokemon played this game in May of 2023. We looked for a patch to fix the issue of the music having random beeps in it, but didn't find one. In case none exists,
we created one. It works for Victory Fire, but also Resolute and Mega Power as well because it's the same problem in all three.
Technical details:
The problem is that VF/Res/MP seem to have erroneously used instrument lookup tables as free space and overwrote pieces of them with new data. There's also extra data inserted into the leading and trailing silence of the instrument samples themselves, but it doesn't seem to cause any audible issues aside from maybe a bit of crackling here and there. The cause of the beeping is a combination of a mistake GameFreak made, and the overwritten table exposing it. The instruments are put together in 190 "voice groups". Each song picks a voice group and that tells the sound system what instruments to use. Some instruments, like the trumpet, have multiple samples that get swapped out depending on which octave is supposed to be played. The way this is done is each instrument with multiple samples has its own voice group that groups together the samples. It uses one of five octave lookup tables to figure out which sample out of that voicegroup to play.
For some reason, GameFreak made the voice group table for the three trumpet samples way longer than it needs to be and filled it with default instruments (square waves). This isn't a problem, because the octave lookup table the trumpet uses never calls for the square waves. But now that the octave lookup table is filled with garbage data, the trumpets turn into square waves for many of the common octaves.
The solution was simple: find free space elsewhere in the ROM (there's almost a megabyte of unused space right before the sprites that VF/Res/MP barely used), put a new copy of the vanilla octave lookup tables there (they're just over a kilobyte in size), and change the pointers in the voice groups to use the new location.
That's it. Beeps are gone.
And since the same space is empty on all three games, the patch works for all three games. It only modifies the music tables, so it shouldn't affect any game saves. Enjoy!