HoMM3 HD is a mod (add-on) for the game Heroes of Might and Magic 3.

rebellious, thank you.

Installing the Russian megapack will help solve your problems (it can be found on the author's page).

I didn't find the Russian megapack on the patch website, and I'm not quite sure what you mean.

This allows the game to play all sound effects in a separate thread, which noticeably speeds up the game. After installation, the end-of-turn music plays slowly and glitches.