And I am disagreeing with you [...] I personally do not believe 50KB could do it for this particular game. [...] I think, like the music, it's in the executable.I think I have not been clear enough : There is no belief nor areement nor thoughts going on, it's just a fact that EFFECTS.ALL contains all sound effect data from the game. Years ago I tried to reverse the FF7 sound engine bytecode by changing the hand cursor sound effect and it is located at 0x1000 in EFFECTS.ALL. The first 0x1000 bytes are pointers for each sound effects for the game, and then it is data. I failed to reverse the FF7 sound engine bytecode, however I succedded in locating the sound effects and affecting them somehow.
If you still do not believe me, just change the first pointer, not 0xFFFF but the one coming just after this, 0x0000 and 0x000b, each sound effect is 2 tracks, and use another pointer. You should be able to see other sound effects of the game playing when you move your cursor. You can also see the hand cursor sound effect is 0x16 or 22 bytes long - sure it's pretty short but it gives you an estimation to how many bytes are needed to store simple sound effects. Finally it seems there's 731 effects and not 750 as you claim.