Quiet sound during a conversation (The Witcher 3: Wild Hunt)

Hello, I decided to play in addition heart of Stone and met with one problem during a conversation, the sound becomes very quiet, and in all other cases, all is well. When they passed the main branch with a sound of problems was not, all has begun with this Supplement. Do not play with the speakers and the headphones.

Tried to solve myself:
1) In the audio file.ini twisted to the max
2) the Sound changes to 5.1 and 2.1
3) re-installed the game :)

None of this did not help me. Don't know how to solve this problem ?