Yes, and this is the page where you will not change anything. This is the one that is displayed inside the "frame" on your homepage.
This is what you have now:
you have the index.php or index.html (one of those) -> this page has this frame inside which you are loading the yamaha3 page.
What we need to do is change the index.php/index.html so that instead of loading the other page inside it, we will just redirect the user to the yamaha3 page.
So we need to modify the index.php/index.html, not the yamaha3, that one is fine as it is now