diff --git a/configuration.nix b/configuration.nix
index 4937219..dfbda19 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -31,10 +31,6 @@
   # Activate Flakes.
   nix.settings.experimental-features = [ "nix-command" "flakes" ];
 
-  # Enable sound.
-  sound.enable = true;
-  hardware.pulseaudio.enable = true;
-
   services = {
     # Set XServer Options.
     xserver = {
@@ -79,15 +75,37 @@
     alacritty
     dmenu
 
+    acpilight # For setting Backlight.
+
     gnome.nautilus
     lxqt.lxqt-policykit # provides a default authentication client for policykit
   ];
 
+  # permissions for acpilight
+  services.udev = {
+    enable = true;
+    extraRules = ''
+      SUBSYSTEM=="backlight", ACTION=="add", \
+        RUN+="${pkgs.coreutils-full}/bin/chgrp video /sys/class/backlight/%k/brightness", \
+        RUN+="${pkgs.coreutils-full}/bin/chmod g+w /sys/class/backlight/%k/brightness"
+    '';
+  };
+
   nixpkgs.config.allowUnfree = true;
 
   # Enable zsh for setting it as shell for users.
   programs.zsh.enable = true;
 
+  # Audio
+  # rtkit is optional but recommended
+  security.rtkit.enable = true;
+  services.pipewire = {
+    enable = true;
+    alsa.enable = true;
+    alsa.support32Bit = true;
+    pulse.enable = true;
+  };
+
   # Set stateVersion. Leave it as set.
   system.stateVersion = "23.11";
 }
diff --git a/home/default.nix b/home/default.nix
index 933c106..6f3d1fe 100644
--- a/home/default.nix
+++ b/home/default.nix
@@ -17,15 +17,12 @@
       # system tools
       lm_sensors
       arandr
+      pavucontrol
+
+      obsidian
+      lean4
 
-      # noch ned conf
-      #betterbird
-      #bitwarden
-      # dropbox
       firefox
-      #signal-desktop
-      #telegram-desktop
-      # zathura
     ];
 
     # environment.shells = [ pkgs.zsh ];
diff --git a/home/programs/git.nix b/home/programs/git.nix
index dd932f5..05fd24b 100644
--- a/home/programs/git.nix
+++ b/home/programs/git.nix
@@ -5,5 +5,9 @@
     enable = true;
     userName = "4Lost";
     userEmail = "elias.schroeter@e.email";
+    signing = {
+      key = "0x99D2EF975FE523CC";
+      signByDefault = true;
+    };
   };
 }
diff --git a/home/programs/neovim/lua/plugins/obsidian-nvim.lua b/home/programs/neovim/lua/plugins/obsidian-nvim.lua
index 3973302..06a53ea 100644
--- a/home/programs/neovim/lua/plugins/obsidian-nvim.lua
+++ b/home/programs/neovim/lua/plugins/obsidian-nvim.lua
@@ -3,8 +3,8 @@ return {
     "epwalsh/obsidian.nvim",
     lazy = true,
     event = {
-      "BufReadPre home/elias/dropbox/",
-      "BufNewFile home/elias/dropbox/",
+      "BufReadPre /home/elias/Dropbox/IJB/IJB-Notes/*",
+      "BufNewFile /home/elias/Dropbox/IJB/IJB-Notes/*",
     },
     dependencies = {
       "nvim-lua/plenary.nvim",
@@ -17,8 +17,8 @@ return {
       require("obsidian").setup({
         workspaces = {
           {
-            name = "COe",
-            path = "/run/user/1000/gvfs/smb-share:server=192.168.0.100,share=administration/NetzwerkTeam/wiki",
+            name = "IJB-Notes",
+            path = "/home/elias/Dropbox/IJB/IJB-Notes",
           },
         },
       })
diff --git a/home/programs/rofi/default.nix b/home/programs/rofi/default.nix
index da50112..e46fb1a 100644
--- a/home/programs/rofi/default.nix
+++ b/home/programs/rofi/default.nix
@@ -1,7 +1,7 @@
 { pkgs, ... }:
 
 {
-  home.packages = with pkgs; [ oranchelo-icon-theme nerdfonts pass xclip ];
+  home.packages = with pkgs; [ oranchelo-icon-theme nerdfonts xclip ];
 
   xsession.initExtra = "setxkbmap de"; # rofi pass needs this to be set
 
@@ -29,8 +29,6 @@
         EDITOR='rofi-sensible-terminal -e vim'
         clibpoard_backend=xclip
         clip=clipboard
-        password_length=32
-        default_user="$\{ROFI_PASS_DEFAULT_USER-$(whoami)\}"
       '';
     };
   };
diff --git a/home/programs/xmonad/src/xmonad.hs b/home/programs/xmonad/src/xmonad.hs
index 1b9df5a..96a7e00 100644
--- a/home/programs/xmonad/src/xmonad.hs
+++ b/home/programs/xmonad/src/xmonad.hs
@@ -14,7 +14,6 @@ main = xmonad . ewmhFullscreen . ewmh . xmobarProp $ def
         }
       `additionalKeysP`
         [ ("M-p", spawn "rofi -show \"drun\"")
-        , ("M-S-p", spawn "rofi-pass")
         , ("M-b", spawn "firefox")
         , ("<XF86MonBrightnessUp>", spawn "xbacklight -inc 10")
         , ("<XF86MonBrightnessDown>", spawn "xbacklight -dec 10")