Stuttering sound in preview, can't understand a word

Hello there,
i am not sure how it was with the nvidia drivers but now i got a rx560 4gb amd card.
however it may not even affect my problem:

While video playback seems okey, i literally can’t understand a word from my audio layer in the preview.

I already tried this “scrub audio” feature but nothing changed.
As well i reverse checked using Pitivi and it has no issues so i assume it’s a Shotcut related issue.

CPU:       Hexa core AMD Phenom II X6 1055T (-MCP-) cache: 3072 KB
           clock speeds: max: 2800 MHz 1: 2809 MHz 2: 2809 MHz 3: 2809 MHz 4: 2809 MHz 5: 2809 MHz 6: 2809 MHz
Memory:    Used/Total: 9160.6/15967.3MB
           Array-1 capacity: 32 GB devices: 4 EC: None
           Device-1: DIMM0 size: No Module Installed type: N/A
           Device-2: DIMM1 size: 8 GB speed: 800 MT/s type: DDR3
           Device-3: DIMM2 size: No Module Installed type: N/A
           Device-4: DIMM3 size: 8 GB speed: 800 MT/s type: DDR3
Graphics:  Card: Advanced Micro Devices [AMD/ATI] Baffin [Radeon RX 560]
           Display Server: x11 (X.Org 1.19.5 ) driver: amdgpu Resolution: 1920x1200@59.95hz
           OpenGL: renderer: AMD POLARIS11 (DRM 3.18.0 / 4.13.8-1-ARCH, LLVM 5.0.0) version: 4.5 Mesa 17.2.3
Drives:    HDD Total Size: 1244.3GB (71.0% used)
           ID-1: /dev/sda model: WDC_WD10EAVS size: 1000.2GB <- exporting to here
           ID-2: /dev/sdb model: Corsair_Force_LS size: 60.0GB <- working here
           ID-3: /dev/sdc model: Corsair_Force_GT size: 120.0GB
           ID-4: /dev/sdd model: SATA_SSD size: 64.0GB
OS:        ArchLinux
ShotCut:   v17.10.30

core/glib2 2.54.1-2 [Installiert]
core/glibc 2.26-5 (base) [Installiert]


Would be very happy for help - if more info is needed, i'll give my best to provide it.

Does your computer satisfy Shotcut’s minimum requirements?

What are the minimum system requirements?
Operating system: 64-bit Windows 7 - 10, Apple OS X 10.8 - 10.10, or 64-bit Linux with at least glibc 2.13.

CPU: x86-64 Intel or AMD; at least one 2 GHz core for SD, 2 cores for HD, and 4 cores for 4K.

GPU: OpenGL 2.0 that works correctly and is compatible. On Windows, you can also use a card with good, compatible DirectX 9 or 11 drivers. We do not have a list.

RAM: At least 4 GB for SD, 8 GB for HD, and 16 GB for 4K.

Hello, i just edited my post to provide more informations, i think they match.

Here the (default) audio settings as only one image is allowed in a post: