Nier Audio and Visual Glitches

I have 2 main issues with Nier (BLUS30481) but only one is present at a time
If I use the Vulkan renderer then I get absolutely horrible audio crackling 
If I use OpenGL the audio crackling goes away but the graphics looks worse and causes the dynamic lighting to flicker uncontrollably
If I set the any resolution setting too high the game doesn't start and just stays at a black screen
I'm running it at 1280x720 at 200% scale and 128x128 threshold

I've tried:

• changing the PPU decoders
  
• changing SPU decoders
  
• SPU threads
  
• SPU block size
  
• using accurate xfloat
  
• Changing resolution, scale, and scale threshold
  
• enabling/disabling vsync
  
• changing audio settings
  

Nothing has fixed either problem and both problems exist on NieR: RepliCant as well


My specs:

• Windows 10 Pro 64-bit
  
• i7-4790k
  
• Nvidia GTX 970
  
• 16GB DDR3 RAM
  

If any additional information is needed please let me know and I'll try my best to provide it.

I should also mention that I've gone back to test the game with each new build that has gotten released.
So on the latest version the light flickering on OpenGL has gotten significantly worse and the audio crackling on Vulkan has gone down a lot but is still apparent enough to be annoying, if not problematic.