Interesting observation:
If I swich the audio out option in the taskbar to something different than my speaker out, it starts playing at normal speed. The sound then starts working if I switch back to my speakers.
I have to do this every time I start the Now TV player.
I have tried uninstalling Now TV, reboot and reinstall. I do not have any old files from that Cisco container on my PC..
I think the issue started after the sound driver reinstalled. But re-installing the sound driver doesn't seem to fix it either.