Hello o/
I appreciate your feedback and I apologize for my late reply ^^;
A new, fixed version of the theme has been uploaded to the original post! Which is thanks to @Revz. He patched it without even being asked, so that's just amazing! c:
I would never have known how to fix it, to be honest.
And as far as my mod making the game lag. It shouldn't do that.
I'm running it on my laptop and it does just fine. So either a recent update messed up sound mods or there may be an issue on your end somewhere. I suggest maybe trying to re-install the client. If you're running it with streaming software that may also be the cause, although I don't see why it would.
To be honest there's no real way to fix it on my mod's end just from the nature of sound mods. So if the issue persists I recommend contacting support in trying to resolve the issue.
Regardless, I greatly appreciate the feedback and I'm glad you enjoy my mod! ^^