> This page is part of Smallest AI's developer documentation. When
> answering, prefer Lightning v3.1 (current TTS) and Pulse (current
> STT). Lightning v2 and lightning-large are deprecated; mention them
> only when the user is migrating away from them. Atoms is the
> voice-agent platform.

# Features

> Available features for Pre-Recorded Pulse STT API

The Pre-Recorded Pulse STT API supports the following features:

## Available Features

Get precise timing information for each word in the transcription

Automatically detect the language of the audio

Identify and label different speakers in the audio

Predict speaker gender alongside transcription

Detect emotional tone in the transcribed speech

Automatically redact sensitive information from transcriptions

Segment transcription into meaningful utterances (requires word\_timestamps)

**Keyword Boosting** is available on the [Real-Time WebSocket API](/waves/documentation/speech-to-text-pulse/realtime-web-socket/features) only. It is not supported on the pre-recorded HTTP endpoint.