GPT4Audio is a speech-to-text and text-to-speech AI-based desktop application developed by Gravity Storm Software, LLC. It utilizes the Generative Pretrained Transformer (GPT) language model developed by OpenAI to transcribe audio files, translate languages, generate human-like text, and perform various natural language processing tasks.

To use GPT4Audio, follow these steps: 1. Download and install the GPT4Audio desktop application. 2. Launch the application on your Windows desktop. 3. To transcribe audio files, select the desired audio file and click the 'Transcribe' button. GPT4Audio will convert the audio into text. 4. To translate languages, select the language source and target, input the text, and click the 'Translate' button. 5. To generate human-like text, input a prompt or select a model parameter and click the 'Generate' button. 6. GPT4Audio also allows dictation to microphone and real-time text and audio recording.