Ar Nosurge: Ode to an Unborn Star [BLUS31478]

When emulating this game or Atelier Shallie (and probably all games of using this engine) I get very strong audio stuttering with all audio outputs and all SPU thread settings, while the video runs almost completely smoothly. It makes it almost impossible to listen to. Couldn't find a way around this. Am I alone with this problem?

I have the same problem (try only ar nosurge).
OS: Windows 7 (Service Pack 1) (64 bit)
CPU: Intel® Core™ i5-2500K CPU @ 3.30GHz
GPU: AMD Radeon HD 7800 series
Radeon Software Version 18.2.2
RAM: 8 GB

Disabling vsync makes sound better, but not perfect. (and, yes, video is extremely slow)
Moving disk image and emulator on SSD does not change anything