No sound over RDP WEB SSL

[Centrocito]

Hello, having a small issue here

Everything is working fine I can connect to the machines over RDP over the WEB Portal but no audio is coming through

Im testing the audio and I can see that Windows indeed is playing the sound 

Already tried 3 deferents browsers

Chrome

Firefox

Opera

Tried other machines with no success (Can connect but no audio)

Tried disable Java

Anyone with the same issue?