Getting microphone to work in Server 2012 RDS

I think I've read all known articles on this and still cannot get my microphone to be detected in RDS.  Please help.

I have applied the following GPOs to my RDS farm:

• Enabled "Allow RDP redirection of other supported RemoteFX USB devices"
• Enabled "Allow Audio recording redirection"
• Enabled "Allow Audio and video playback redirection

I have amended the local registry of my servers:  

Computer\HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-TCP\fDisableAudioCapture =0

ALSO:

• Desktop Experience is installed.
• Windows Audio Service is running
• Windows Audio Endpoint Builder Service is running
• Using RDP v.10.   Settings has "Record from this computer" enabled.
• I am using Windows 10 professional.
• I have Microsoft LifeChat USB headphones plugged into my PC.  Sound and microphone work fine locally.
• Sound works fine inside RDS with my headphones.

I just cannot get my microphone to be detected.  It just says "No audio devices are installed".

Please can anyone help?

Thanks