# Release Notes: Audio Analyzer

This page tracks releases of the Audio Analyzer microservice. The most
recent release is listed first; older entries are preserved for history.

## Version 1.5.0

**Release Date:** August 2026

**New:**

- OpenAI-compatible streaming transcription over Server-Sent Events, in
  addition to the existing NDJSON `/stream` variant.
- Realtime transcription support over a WebSocket endpoint for
  low-latency, bidirectional audio streaming.
- Video Summarization Service (VSS) compatibility for the transcription
  API response shape.

**Improved:**

- Speaker diarization now splits merged segments by voice and persists
  enrolment data across restarts.

## Version 1.4.0

First release of the Audio Analyzer as a self-contained,
OpenAI API-compatible speech-to-text microservice with optional voice
sentiment analysis, built for edge deployment on Intel hardware.

**Release Date:** June 17, 2026

**New:**

- OpenAI-compatible transcription API (`POST /v1/audio/transcriptions`)
  and a streaming NDJSON variant (`/stream`).
- Multi-backend ASR: `openai` (PyTorch Whisper), `openvino`
  (Intel-optimized), and `whispercpp` (CPU-only).
- Full Whisper model family supported (`tiny` → `large`).
- Optional voice sentiment analysis with session-level aggregation
  (`openvino` or `pytorch` provider).
- FFmpeg-based preprocessing: chunking, silence detection, optional
  RNNoise denoising.
- Session continuation via `session_id` (returned in `X-Session-ID`).
- Health (`/health`) and ALSA device listing (`/devices`) endpoints.
- New User Guide doc set, including: overview, get-started, how-it-works  configuration, api-reference, and troubleshooting Markdown files, plus an architecture diagram and a restructured README.md.

**Improved:**

- OpenVINO CPU/GPU acceleration on Intel hardware; models warm-loaded
  once per process.
- Layered config (`config.yaml`, env overrides via
  `AUDIO_ANALYZER__...`) and Docker Compose deployment on port `8010`.
- Container now runs as a non-root user (UID 1000).

**Known issues:**

- The `prompt` form field is accepted for API compatibility but
  currently ignored.
- Compatibility with the Video Search and Summarization sample
  application will be added in a subsequent release.

## Version 1.3.1

**Release Date:** April 2026

**New:**

- Released as part of `release-2026.0.0`.
- Supported features based on the requirements of the Video Search and
  Summarization sample application. Refer to that sample's release notes
  for details on this microservice at that version.