Pixel Streaming bad audio quality


we have a Pixel Streaming Build up and running an are so far quite happy with the results but we have a big problem getting a good audio signal using pixel streaming. It is really low quality and we have no idea where to look, to improve the audio. Has someone experienced something similar and has an idea?

We use a Media Player to play a video and a Media Sound component to play the audio. If it helps any further.

Any suggestions are highly appreciated