Sound stuttering

[FalconX]

Hello,

I have an Asrock Beebox with N3150 with LibreElec CommunityBuild (devel-20170216) installed. Dolphin 7.90.001-2886 is preinstalled with EmulationStation.
Sound is going through HDMI (ALSA) to my TV.
First I got no sound at all, than I found a working asound.conf file from here:
http://www.gentooforum.de/artikel/18040/asound-conf-fu-meister-gesucht-kan-le-duplizieren-klonen.html

Now I have sound, but it's distorted and stuttering.
For example, when I start Mario Kart, in the menue, sound plays fine, but when the intro video starts the sound gets bad.
The video is good, I would say (almost) fluent, but the sound...
Is my CPU just to slow, but why is the video not stuttering than?

Anyone knows any optimations I can make in Dolphin or especially in the asound.conf?
Maybe different audio buffering or something like that?

[JMC47]

If the game is not running full speed, the sound will stutter when it runs out of buffer. A video can use a lot of CPU (emulating a CPU/GPU decoding video) so, it may be that the CPU isn't fast enough. I'm not exactly familiar with that processor.