Orpheus-FastAPI is a high-performance self-hosted text-to-speech server built with FastAPI.
It provides an OpenAI-compatible /v1/audio/speech endpoint together with a modern web interface for generating speech locally. The project is designed to work with external inference servers such as llama.cpp, LM Studio, and GPUStack, and focuses on fast GPU-accelerated synthesis with support for expressive tags, long-form generation, and multilingual voice models.
This is free and open source software.
Key Features
- Provides an OpenAI-compatible text-to-speech API endpoint.
- Includes a responsive web interface with waveform visualisation.
- Supports multilingual speech synthesis with multiple voices across several languages.
- Supports emotion tags for more expressive generated speech.
- Handles long-form audio generation through batching and crossfaded stitching.
- Can connect to external inference servers such as llama.cpp, LM Studio, and GPUStack.
- Offers Docker deployment options for GPU, ROCm, and CPU-based setups.
- Optimised for fast local inference on RTX-class GPUs.
Website: github.com/Lex-au/Orpheus-FastAPI
Support:
Developer: Alexander J.
License: Apache License 2.0
Orpheus-FastAPI is written in Python. Learn Python with our recommended free books and free tutorials.
Related Software
| Speech Tools | |
|---|---|
| Piper | Fast, local neural text to speech system |
| Tortoise | Multi-voice text-to-speech system trained with an emphasis on quality |
| Coqui TTS | Offers pretrained models in more than 1,100 different languages |
| Bark | Transformer-based text-to-audio model. |
| Festival | General multi-lingual speech synthesis system |
| PraatSpeechAnalyser | Software for speech analysis and synthesis |
| Speech Note | Speech to Text, Text to Speech and Machine Translation |
| Mimic 3 | Lightweight Text to Speech engine |
| OrcaScreenReader | Scriptable screen reader |
| Flite | Small, fast run time text to speech synthesis engine |
| RHVoice | Gives the visually impaired a synthesis voice with their screen reader |
| eSpeak NG | Continuation of the eSpeak project |
| eSpeak | Speech synthesizer using a formant synthesis method |
| Gespeaker | GTK-based frontend for eSpeak |
Read our verdict in the software roundup.
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