@paradadf Correct, for reference lets say "controller one" will control P1 and P2 while "controller two" does nothing in the game. In the recalbox menu both controllers work, and in the recalbox controller settings configuration it recognizes them as two separate controllers.
When I have two SNES30 controllers connected via USB and load a two player game, the 'second' controller does not respond and the 'first' controller moves both player 1 and player 2 simultaneously. The 'second' controller is totally unresponsive in the game but works just fine in recalbox menu. Here is a youtube video I made showing the issue: https://youtu.be/HNvomkzje3s
I have tried factory resetting the controller with no success. This occurs whether I simply plug both controllers in and attempt to play the game or if I go through and configure each controller seperately and then set P1 to #0 SNES30 and P2 to #1 SNES30. Any ideas?
It seems that all three SNES cores give the same input lag. POCKETSNES is particularly buggy in that pressing start on my only controller registers as a START from P2 as well. And then P2 just tracks what I'm pressing as P1. Going to dig into Retroarch settings now (video and input drivers perhaps?). The sound is quite odd on this game as well across all three cores, the sounds seem to be reverb or echo expanded. Hard to describe...
Yes input lag. I will try this when I get home!
About 99% of my SNES roms play just fine but Mortal Kombat (USA) is quite laggy. I have tried it with a wired keyboard, wired SNES30, and SNES30 in bluetooth mode. I am wondering... should I be messing with retroarch settings like video driver, etc... Or should I try a different core (I'm set to default now).
If this ends up being a core issue, is there a way to set some roms to play from a specific core and leave the others at default or a diff core?
Thanks as always. Excited to be smoothing out the last few issues while learning some more linux.
I missed that 
I'm excited and working too fast. Does scraper.exe work correctly when used with your batch script?
Yes, that wiki and on Windows 7.