Shane wrote:
Ok, just tested it in a blank map and it works perfectly so there must be something else preventing it from working

Moral of story: Don't edit PTI maps in Hammer.

I believe the issue is caused by the re-arrangement of files that comes with DLC1 and/or 2
Things that worked properly prior to the release of DLC1, no longer work properly

for example, if I create an ambient_generic and then search for 'Raw' sounds with the filter of 'Glados', the ONLY sounds I can hear are ones from DLC1

This problem is surely related to one or the other of DLCs

Habzs wrote:
Moral of story: Don't edit PTI maps in Hammer.

Moth wrote:
I had exactly the same issue with my contest entry map. I added a radio, and wanted it to play music in a 1024 area at volume 7, but it just refused to work!!?!

I believe the issue is caused by the re-arrangement of files that comes with DLC1 and/or 2
Things that worked properly prior to the release of DLC1, no longer work properly

for example, if I create an ambient_generic and then search for 'Raw' sounds with the filter of 'Glados', the ONLY sounds I can hear are ones from DLC1

This problem is surely related to one or the other of DLCs

Entirely possible, the DLC broke a lot of stuff