Add README

Added installation instructions, dependencies, and audio processing guide

Author: techtechcy

README.md

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+# TechTech's Sound Mod
+A mod that allows you to edit some Among Us sounds by just dragging .wav files in the Among Us folder.
+
+
+
+
+## Installation
+
+- Go to [Tags](https://github.com/techtechcy/TechTechsSoundMod/releases) and click on your Among Us version. Then, download `TechTechsSoundMod.dll`
+
+- Open your Among Us game folder (probably at `C:\Games\Steam\steamapps\common\Among Us\`, if not, open Steam, go to your library, go to Among Us, click on the gear icon -> Properties, go to installed files, and press `Browse`)
+
+- If you don't already have BepInEx, install it for your Among Us version
+
+- Download the [Dependencies](https://github.com/techtechcy/TechTechsSoundMod#Dependencies) and put them in `Among Us\BepInEx\plugins`
+
+## Dependencies
+
+- [Reactor](https://github.com/techtechcy/TechTechsSoundMod/releases)
+- [Mira API](https://github.com/NuclearPowered/Reactor/releases)
+
+
+## Guide
+
+- After installing the mod, start your Among Us once (if it's your first time opening Among Us after modding it, expect it to take a long time).
+
+- After it finishes loading, quit the game and navigate to your Among Us folder
+
+- Locate the `TechTechsSounds` folder and open it
+
+- Put all your .wav files here and rename them accordingly (open the README.txt in the folder for more info)
+    #### WARNING: The files need to be processed for Among Us to accept them. More info in [Audio Files](https://github.com/techtechcy/TechTechsSoundMod#Audio) 
+
+- Relaunch the game, verify that the mod is enabled (Go to `Settings` -> `SM Tab` and verify that `Mod Enabled` is true)
+
+
+## Audio
+Among us doesn't just accept every .wav file. In order to process your audio file, it is recommended that you use a program like [Audacity](https://github.com/techtechcy/TechTechsSoundMod/releases).
+
+### Steps using Audacity:
+- Drag & Drop your .wav file into the editor.
+- Click `File` -> `Export Audio` -> `Export to computer`
+- Select an output path
+- Set up the settings as seen below:
+    - Channels: `Stereo`
+    - Sample Rate: `44100 Hz`
+    - Encoding: `Signed 16-bit PCM`
+<img width="491" height="158" alt="image" src="https://github.com/user-attachments/assets/8e43f5cb-01cd-4d5f-a066-0cfdcb67d809" />
+
+- Press `Export`