A calm song played at the Memorial Theatre menu screen.
There's two defines at the text file, one which adds the melody guitar listened on the original, with the full sample, and other thats optimizes that guitar.
Since this guitar samples is from Secret of Evermore, and its a really MASSIVE sample, it ends up being incompatible with the Thunder SFX sample. Of course, if you wants this sample compatible back, you can use the optimized version instead.
You can choose those variants, by opening the text file, and changing the "Include_Melo_Guitar" define values by: 0 for no guitar, 1 for full guitar sample, and 2 for optimized guitar sample. Any other value will end up sending an error message once you inserts it. (which is an obvious to happen, silly)