I installed 1694, and had similar sound problems, tried a few of the remedies above without much improvement, I reduced the number of stops as low as 6 still not completely cured. Tried altering the audio settings and on clicking OK everything locked up "Not Responding", had to exit GO.
Restarted GO, no sound output at all, so tried to restore original Audio settings, locked up again.
So I uninstalled 1694, installed 1735 (64 bit) on opening that immediately showed the Audio/Midi settings window and locked up.
Next tried downloading GO2, again no sound. I've tried deleting the GO cache and data in My Docs but previous organs are still being loaded automatically when loading a newly installed GO, so it would seem that I've not managed to find all the stored data, and the lack of sound may be due to that data.
Sound works OK for Media player, Youtube etc. Processor is an AMD quad core A10-6800K APU 4.1Ghz, 8 GB ram, Win7 pro 64 bit, on board Realtek High definition audio
HEEEEEEEEEEEEEEEELLLLLLLLLLLLLLLLLLPPPPPPPPPPPP