Nier [BLUS30481]

Faster cpu = better audio. It's not really caused by running the game at 30. The game is supposed to run at 30 anyway it's just that RPCS3 doesn't cap it properly unless you use the framelimiter.

I'm also having problems with the audio stutter in NieR (BLUS30481). I've tried to play it on my PC and my Laptop, but I have severe audio stutter on both of them.
I'm using the same versions of rpcs3 (v0.0.5-7491-986bb243 Alpha) and all necessary programs on PC and Laptop.

Specs:
PC:
Intel Core i5-4460
8GB RAM
Radeon R9 280X

Laptop:
Intel Core i7-8550U
16GB RAM
(Intel UHD Graphics 620: not in use)
NVIDIA GeForce 930MX: in use with Vulkan, OpenGL won't even start the game

Even though my Laptop has better specs (except for the graphics card), the audio stutter is even worse there. However, it seems to be more of an audio stutter/lag 
instead of the crackling sound I'm getting on the PC. I've probably already tried all changeable options in the rpcs3 options and config files, but I can't seem to find
a solution. I managed to lower the crackling on my PC by setting the Preferred SPU Threads to 1(Edit: I reset all options on my PC today to once again check all options one by one. Turns out that setting the Preferred to SPU Threads to a lower value actually made no difference for Audio or FPS. One more thing: The overall performance in FPS resembles the audio "quality", since the audio crackling gets worse when the FPS drop and almost vanish once I get smooth 30 FPS), but it still remains to the point where I can't see myself playing it for more than 10 minutes.
I have little to no complains about the overall performance, I'm getting 20-30 FPS on both devices (which I don't really get, since nothings really being used more
than 70% on my Laptop, not even my graphics card or the CPU).

I hope someone can help me with the audio. If you need more information about specs or settings please tell me.

Yeah, I'm having the exact same problem as you here. I'm running on version [RPCS3 v0.0.5-9a66ed56 Alpha | osk], which I'm having to use since it fixes the issue I was having with Invalid Name Input at the main menu.

Specs:
AMD FX-8350 
16GB RAM
NVIDIA GeForce GTX 1050Ti

I have little to no experience with RPCS3 but through trial and error I've arrived at the configuration as follows:

CPU:
LLVL Recompiler
ASNJIT Recompiler
Load libv2.sprx only
Enable thread scheduler
Enable SPU loop detection
SPU Cache
2 SPU Threads
Giga SPU Block Size

GPU:
Vulkan
Framelimit - 30
Auto Anistropic Filtering
1280x720 with Default Res Scale and Res Scale Threshold
Write Color Buffers On

Like you, in certain areas where the FPS drops below 30, usually to about 24 at the lowest (however it can drop as low as 18 in the village for some reason), the audio crackling starts to pick up. The game is by no means unplayable, but the crackling is an annoyance and I hope someone will be able to help myself and others find a fix soon.