Rpg Maker Developers Group

So like many others I've come across issues where I'm experiencing terrible delay in both BGM, ME and even SE files being played. It's quite ridiculous actually to have footstep sounds lag ~2 seconds behind and I'd say it's unacceptable so I've been looking for a fix.

I've seen a lot of preload manger plugins but they all seems faulty, old and reading the more recent replies in those threads makes me not what to use any of those. I did find a Japanese(?) plugin that someone put up somewhere on this forum as well but that one, while it works, has some weird scratchy noises added to the BGM tracks. It's barely noticeable but still, I don't like that.

So after much searching I've decided to try with Irina's AntiAudioDelay plugin and Galv's ImageCache plugin.

Both of these plugins seems to try to prevent delays to happen by allowing the dev to set higher Cache limits. But... I know nothing of how cache works! How will this help? What's too high? What numbers would start show diminishing returns, etc? I'd be very happy if someone could explain this to me.

Below is a print screen from Irina's plugin in the plugin manager. the parameters were originally set to "10" as cache limit but I didn't notice any change so I just arbitrarily changed it to "30".
What that a good move? The way it's written it almost seem to imply that "1" cache = "1" BGM track, in which case I could just keep it at "10" since I don't have more songs than that in this game.

And below here we have Galv's plugin and how it looks in the plugin manager. Apparently I can set image files to load into memory (cache?) So I did that too for some of my larger VN backgrounds and busts.
But I'm not sure how much this helps or how much extra strain it puts on the system? Is it wise to preload about seven 1280x720 background images with this plugin? Considering I've also set it up to preload all character busts and those character sheets are even larger due to multiple expressions (something like 2000x3000 for each file). Am I front loading too much? How much "cache" is this?
TLDR; In a nutshell I've no idea what I'm doing with these plugins but I want to set them up right to maximize the gain and minimize any risks of front loading too much or causing memory leaks or what not. Please teach me.