pipecat/changelog/4340.added.md

• Added XAISTTService for real-time speech-to-text using xAI's voice STT WebSocket API (wss://api.x.ai/v1/stt). Streams raw audio (PCM, µ-law, or A-law) and emits interim and final transcription frames driven by the server's is_final / speech_final flags. Settings expose interim_results, endpointing, language, multichannel, channels, and diarize. Requires the xai optional extra (pip install "pipecat-ai[xai]").