Steam Streaming + RDP - No Sound

I have a Windows VM that I connect to using RDP. Gaming over RDP mostly works, but there are some limitations - games have to run windowed, and in some FPS-es (e.g. Halo Reach) that means mouse capture doesn't work properly.

So what I do in those cases is:

tscon <connection id> /password:<my password> /dest:console

This turns the RDP session into a console session, and disconnects the RDP session, which in turn enables the Steam client on my Linux workstation to connect and stream games from my Windows VM via Steam streaming.

So far so good, this works great.

Unfortunately, this results in Steam streaming having no sound. Sound works fine when gaming over RDP, but over Steam streaming there is no sound at all. Selecting Steam streaming audio output in the games that have such a setting makes no difference.

The Windows VM has two real audio devices:

Emulated ICH6 audio
Nvidia GeForce HDMI audio (from the Nvidia card connected to the VM via PCI passthrough)

Has anyone got any idea what is going on or how to investigate further? My best guess is that switching a RDP session to a console after Steam is running results in something that results in audio still afterwards going to the now disconnected RDP audio socket, but I have no way how I could prove this or work around it.

I know that Steam was never intended to run in a RDP session, but the fact is that I got very painlessly to the point where it does work just fine, I just need to figure out a way to get sound to work when doing Steam streaming.

steam steam-in-home-streaming

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How do I enable Remote Play sound on Steam?

You can view how many speakers Steam detected and choose a different configuration by:

Steam Link. : Before connecting to your host machine, select Settings -> Streaming -> Audio -> Speaker Configuration.

Steam Client. : Select Steam menu -> Remote Play -> Advanced Client Options -> Speaker Configuration.

Why is my game sound not working on stream?

Why when playing a game, viewers say they cannot hear the game audio? Make sure that the audio source itself is not muted or too low where it cannot be heard. If it is still an issue, make sure that you have added the source to which the game is playing through.

How do I unmute sound on Steam?

Bring up the volume slider from the taskbar and click on "Mixer". That will expand the volume control to show you the master volume and controls for individual apps. At the moment, if Steam is muted there will be no audio streamed from that machine (yes, I know that sounds backwards!).

Does Steam Link work remotely?

While the recent release of the Steam Deck has provided gamers with a new way to play games away from their desktop, the Steam Link feature lets you stream your games from anywhere using an Android or Apple device with an internet connection (R.I.P Steam Link Box).

How to Enable Audio On Windows Rdp | Remote Desktop Audio not working

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: ROMAN ODINTSOV, Gabriela Mendes, Ron Lach, Skyler Ewing