Installed Windows 10 on external SDD following these instructions:.Drivers are update to date according to Windows.
To use a device, such as 'Internal Microphone,' click it. You should see a list of devices you can use as a sound source, including, (hopefully) the microphone you want to use. Head to System Preferences > Sound, and then click the 'Input' tab.
In fact, when a video is played the green volumen bars in the audio device driver properties move but there is no sound at all. Windows 10 Device Manager app does not show any problems with the drivers such as yellow triangles or red crosses. Run the Boot Camp Windows Support Software and everything is fine, Apple mouse & keyboard, except audio is missing. I installed Windows 10 (April 18 update) on external SSD drive that can be selected on the iMac's startup.
