Single-player version with launch options set to v. 1.7.2. No sound in the menu, and no sound in game, even with all sound enabled and pushed to full. No sound in brand new game either. Nothing installed to alter sounds in any way.
Environment
Java v. 8, update 121; windows 7; launcher version 1.0.1.0; fully updated minecraft as of 2/13/2017
Most probably caused by MC-76815