@Dan What @Jasper says is correct. And should be taken into consideration with my comment. German and Dutch are simulair on a lot of ways. And I think, with any language dialect also plays a huge part in how understandable somebody is. People who live in Limburg(Dutch province) are very difficult to understand because of their dialect and accent. Although they speak "regular" dutch.
For me, I can understand your soundcloud somewhat. I understand certain Keywords and know what they are talking about but I couldn't translate word for word. The female is harder to understand tho