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+- Added NVIDIA Magpie TTS services via AWS SageMaker: `NvidiaSageMakerHTTPTTSService` (single HTTP invocation, streams raw PCM back) and `NvidiaSageMakerWebsocketTTSService` (persistent HTTP/2 bidi-stream with full interruption support via `InterruptibleTTSService`).
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+- Added `sanitize_text_for_tts()` utility (`pipecat.utils.text.tts_text_sanitizer`) that strips markdown formatting (fenced code blocks, headers, bold/italic, tables, blockquotes, inline code) and emojis from text before sending it to a TTS service.
diff --git a/changelog/4464.added.md b/changelog/4464.added.md
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+- Added `NvidiaSageMakerWebsocketSTTService` for streaming speech recognition using NVIDIA Nemotron ASR via an AWS SageMaker bidirectional-stream endpoint. Produces `InterimTranscriptionFrame` and `TranscriptionFrame` frames, is VAD-aware, and automatically reconnects on error.