Ableton Live 9.7.5, latest ASIO4ALL drivers, Windows 10 Pro updated. If you have several playback devices do this for each of them. FIX: Open the Control panel-Hardware and Sound-Sound-doubleclick on Speakers-Advanced-uncheck exclusive mode. Windows GS wavetable synth active because of exclusive mode checked in playback device. If there's no sound using Asio4all this can have the following reasons: 1. Improvement: UI response time and driver (re-) start time should be a lot snappier now. This bug seems to have been fixed in Windows 10. Workaround for a bug in the Windows 8/8.1 Bluetooth audio driver (causing BSOD when device is opened twice).