All right, tested both builds. Audio still cracks, but test4 seems to work a little better. Test3's audio performance is pretty unstable overall, although it seems to have a better framerate than test4. On the other hand, test4's audio performance is sort of smoother, having the audio to continue playing but the playing speed getting slower. However, as a result it seems to have pretty severe framerate droppings and several game crashes as well, where the player can't render stuff. Mostly when trying to load stuff like maps or animations, the screen dyes red and text appears saying "Couldn't create "size number" x "size number", EasyRPG will close now, Press Enter to exit.". Here's an example with a Standstill Girl map, where framerate dropped drastically after loading the savefile:
The crashes happened several times during testings, but I wouldn't say it's something new to the builds though, I should test previous builds and see if the same crashes occur to be sure. Anyway, this also happened with build test3 as well, but it happened only once while testing the area in the screenshot; entered a battle and the player crashed when trying to do one of the battle animations (something worth mentioning, the savefile I used to reach that point in the game is an rm2k one so the lack of parallax background must be related to that).
Back to music stuff, .wav files play pretty flawlessly compared to .mp3 and midis, but some parts when the audio would crack appeared still (Testgame - WAV Title Screen is one example). I tested .ogg with the Testgame - OGG as well, and gotta say that audio cracks as well, but it seems to have a better performance when it comes to the framerate.
Lastly, .mp3 files work a little better than midis in test3, finding out that mp3 playing is kinda more stable than midi playing (gaps between audio get bigger as the midi keeps playing, while this doesn't happen in mp3 playing). About .ogg playing, it has the same performance as mp3 playing. Also Test4 seems not to have this issue, but audio still may get cracked and won't play properly.
Well, I guess that's the most important stuff I can say about the tests I've been doing this morning. Tell me if you need more details. See you around!