Mounting a real machine sound card in a Win7 Hyper-v virtual machine

Attaching the sound card of the real machine in the Win7 Hyper-v virtual machine
The voice function of Lync has been tested recently. The environment has been built in the virtual machine, but the sound card is not supported in Hyper-V. It has not been tested successfully. After the trial, I finally succeeded. The details are as follows:
1. The real machine is Win7 Enterprise Edition, and the virtual machine is also the enterprise version of Win7. (XP can only support playback without recording in the virtual machine. Microsoft documents say that Win2008 R2 can support recording, but the actual operation finds that it only supports playback, doubts.)
2. The settings of MSTSC in real machine are as follows:
< Br>3. Edit the registry in the virtual machine as follows:
Add a Dword value as shown below

4. Recording device after remote connection

5. Call with Lync in virtual

If you follow the above settings or not, please refer to the following settings:
To enable or disable local device and resource redirection, do the following:
On the RD Session Host server, Open “Remote Desktop Session Host Configuration”. To open “Remote Desktop Session Host Configuration", click Start, point to “Administrative Tools",“ Remote Desktop Services", and then click “Remote Desktop Session Host Configuration”.
Under the "Connections" link, right-click the appropriate connection name and click “Properties”.
In the "Properties" dialog box for the connection, click the <;Client Settings” tab.
Under "Redirects", do one of the following for a given local device or resource category:
Select this check box to disable redirection of this type of local device or resource.
Clear the checkbox to enable redirection of this type of local device or resource.
Click “OK”.