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Piper is a fast, local neural text-to-speech (TTS) system developed by the Rhasspy team. Optimized for devices like the RaspberryPi4, Piper enables high-quality speech synthesis without relying on cloud services, making it ideal for privacy-conscious applications. It utilizes ONNX models trained with VITS to deliver natural-sounding voices across various languages and accents. Piper is particularly suited for offline voice assistants and embedded systems.