Update:
* We have tested 2 streams published with DNAS v2.5.6 and they were also not playable with the current Chrome 55 beta. So it appears that those are also affected.
* We have furthermore reported the issue to the Chromium Team. They at least give some technical hint to resolve the issue on the server side. See:
https://bugs.chromium.org/p/chromium...l?id=669800#c6
* Unfortunately the Chromium team is reluctant to revert the changes that prevent playback of many Shoutcast streams on non-standard Ports