Function zMusicSetVolume

src/SB/Game/zMusic.cpp:475–485

This version of it matches 33%. It's also functionally incorrect.

// This version of it matches 33%. It's also functionally incorrect.
void zMusicSetVolume(float vol, float delay)
{
    volume.cur = vol; // This makes it introduce the "frsp" instruction.
    volume.inc = vol - volume.cur;

    if (delay >
        minDelay) // Doing the if statement likes this makes it generate the "blelr" instruction
    {
        volume.inc = vol / delay;
    }
}

void zMusicReset()
{