Current system : Windows 10 PC. Sound Forge 14 running. Previous functionality - Windows 7 where Sound Forge recorded and played back internal audio and heard through system speakers. Windows 10 plays back audio sources. Stereo Mix (recording) is enabled in Sound tab displaying a bar meter. When Sound Forge is running and set to record ( Preferences are set for the audio recording from Stereo Mix ) no signal is detected or recorded. After Realtek drivers are updated the Audio Manager with the drivers does not run. After system restart with new drivers : when audio signal is present, the Stereo Mix recording tab meter shows the signal levels moving. Sound Forge can detect and record the audio signal and a file is created with a wave pattern. HOWEVER - no audio can be heard from the speakers for any sound file including system sounds. Preferences for audio record set up in sound forge appear correct , and system recording tab : stereo mix enabled and set to default device. When drivers uninstalled, and PC restarted, any audio source can be heard through speakers BUT Sound Forge does not record any audio. I understand that the issue is NOT an issue with Sound Forge but with configuration settings for audio in Sound Forge and Windows 10