Learn how to transcribe audio files using AssemblyAI's Speech-to-Text API and C# in this comprehensive tutorial. Explore the process of authenticating with the API, uploading audio files, sending transcription requests, and parsing JSON responses into C# objects. Discover advanced features like content safety settings and speaker labeling while building a practical application. Follow step-by-step instructions to create a new project, implement file sending functionality, add customization options, and test the finished app. Gain valuable insights into working with APIs, asynchronous programming, and JSON parsing in C#.