Thanks for the posting.
First, we dont support adapters being used to convert the video feed from HDMI to VGA or vice versa. The feed into the display will need to be a straight connection with no adapters. If you use an adapter we really have no way of knowing what the performance will be like.
In reference to your second post, you will need to select the Virtual Audio Device that Intel® WiDi software created when it was installed. If you change to that audio device under your systems control panel, you should hear audio out through a TV. In the case of being connected to a Monitor with no sound, if you were to change the audio device to the local Laptop, you should hear the sound from there.
If you have any other questions, please ask.
Intel® Product Support Engineer