Add audio setup instructions for laptop users

[wasokeli]

On many laptops, it's not possible to turn off the physical speakers. As a result, ALVR audio comes through both the laptop speakers and the headset. So a second virtual audio cable is needed to direct all audio to the headset.

[The-personified-devil]

Afaik (tho I'm very much not sure since I don't run windows) the way ALVR captures audio you should be able to turn down the volume of the output to zero under windows and it should still be captured by ALVR. If that does actually work please update the docs accordingly, otherwise this is the right approach.

Also you'll need to rebase the pr on latest master to fix the misc warnings in CI.

[zmerp]

VR audio comes out of the speakers if it is not configured correctly. There should be a switch for this is the settings, make sure it's enabled

[The-personified-devil]

Oh yea, there should be a setting to mute audio when streaming, are you sure that's enabled?

[wasokeli]

[...] the way ALVR captures audio you should be able to turn down the volume of the output to zero under windows and it should still be captured by ALVR.

That doesn't work on my end; it lowers the headset volume as well.

VR audio comes out of the speakers if it is not configured correctly. There should be a switch for this is the settings, make sure it's enabled
Oh yea, there should be a setting to mute audio when streaming, are you sure that's enabled?

I don't see such an option under Settings > Presets or Settings > Audio. Where is it supposed to appear?

[The-personified-devil]

I don't see such an option under Settings > Presets or Settings > Audio. Where is it supposed to appear?

In the actual settings, not under the presets, it should be Audio -> Game Audio -> Mute when streaming, you'll likely need to expand a few submenus along the way.

Since it's on by default and you didn't get to that menu you probably didn't modify it, so we're probably dealing with a bug or weird behavior with certain integrated devices here, but I'll wait on confirmation from your side.