Why this mod is so important
The Witcher 3 has a terrific music score and you can listen to it for hours. The NPC-Chatter really adds to the atmosphere and is sometimes even funny. But after 150 hours into the game it gets just a bit old. So I wrote a little mod that lets you turn voices, music and subtitles on and off with a hotkey. No more "Pissed my trousers", "...dying from poverty", "Crawl back under your rock!" at every corner :-). And when I need to talk to someone important I just flip it on without having to delve into the menus.

Installation
I heartily recommend W3 Mod Manager because it installs the mod automatically, including the menu entries and hotkeys. After Installation run Script Merger if you have other mods installed. About the nexus mod manager: Since NMM only copies the mod to the mod folder but isn't able to add menu entries or hotkeys, you will have to install them manually if you insist on using NMM :-). Start in that case at 2.

Manual Installation
1. Copy the mod folder to ...\(Your Witcher3 directory)\mods
2. Add the lines from input.settings.part.txt to ...\Documents\The Witcher 3\Input.settings under the proper headings.
3. Add the lines from input.xml.part.txt to ...\(Your Witcher3 directory)\bin\config\r4game\user_config_matrix\pc\input.xml above the line with <!-- [BASE_CharacterMovement] -->
4. If you have other mods installed you need to copy 3 lines from my player.ws to the corresponding file in \mod0000_MergedFiles. Open it with your favorite text editor and look for lines containing modToggleSubsnAudio. Or you could just use Script Merger :-)

You can change the hotkeys in Options\Key Bindings to anything you like. Default Keys are F6, F7, F8. If you want subtitles for the NPC-Chatter you have to activate them first under Options\Video\Hud Configuration\.

Limitations
The hotkeys don't work in the menus.

Similar Mods
No Chatterboxes - teresatiger has taken upon her the monumental task of deleting most repetitive NPC oneliners in the game. She also deleted my comment linking my mod. But i'm not vindictive :-)

Modding resources i used:
Menus in the Witcher 3 - Gamepedia
Keybinds Tutorial by Scacikpl - CDPR Forums
Keybinds Tutorial by Murzinio - CDPR Forums
Modkit by CD Project Red Scriptstudio can be helpful sometimes.
W3 Strings Encoder by memr for localization
Notepad++  A very powerful texteditor. Recommended if you want to make changes to the script.
Witcherscript UDL by Mpstark for NPP

and a lot of scanning the source files in content0\scripts :-)

Mods I Use:
Friendly Hud
Appearances Menu Mod
Debug Console Enabler with Freecam
Debug Console Extensions
Convenient Looting
Fast Travel from anywhere
All Quest Objectives On Map
Colored Map Markers
Sensible Map Borders
No Storybook Intros
No Indignant NPCs
3D Stereo Fix - Nothing beats playing the Witcher in 3D stereo! It's almost like being there!

I tested this mod only on my own Installation (Gog Goty 1.31). If you have any suggestions or just want to express how much you love this mod, please leave a comment :-)