I’m having a problem with Cave Story. Whenever I play it, there is no sound after the title screen. There’s also no menu confirmation sound effect for the selection of Start or Load at the title screen as well. It works fine when I try the exact same files on a PC with NxEngine.
edit: I’m running this on a Samsung Galaxy S4 (Verizon)
On PC, is that NX-Engine standalone or via RetroArch? If standalone, could you try it on RetroArch? That would help narrow down whether it’s a general issue or an android-specific one.
On PC, I was using NX Engine Standalone. I just tested Retroarch PC, and I’m also getting the same problem. So I guess you can move the thread.
Edit: Seems like it screws up if an older version of NXEngine extracted the files previously! I resolved the problem by deleting everything and running it on a clean copy of Cave Story. So maybe it should detect this kind of problem as well? Edit again: Specifically, settings.dat is the file in question. Old versions of NXEngine aren’t compatible with the bundled NXEngine for this file.
I’m glad you got it worked out 
Also, fist-bump for actually posting the solution and not just leaving a dangling thread.