> 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. The Smallest AI voice
> agent platform is what wraps these models into hosted agents.

# Features

> Available features for Pre-Recorded Pulse STT API

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

## Available Features

#### [Word Timestamps](/models/speech-to-text/features/word-timestamps)

Get precise timing information for each word in the transcription

#### [Language Detection](/models/speech-to-text/features/language-detection)

Automatically detect the language of the audio

#### [Diarization](/models/speech-to-text/features/diarization)

Identify and label different speakers in the audio

#### [Gender Detection](/models/speech-to-text/features/gender-detection)

Predict speaker gender alongside transcription

#### [Emotion Detection](/models/speech-to-text/features/emotion-detection)

Detect emotional tone in the transcribed speech

#### [Redaction](/models/speech-to-text/features/redaction)

Automatically redact sensitive information from transcriptions

#### [Utterances](/models/speech-to-text/features/utterances)

Segment transcription into meaningful utterances (requires word\_timestamps)

#### [Keyword Boosting](/models/speech-to-text/features/keyword-boosting)

Boost recognition accuracy for specific words, brand names, and domain terms. Pass `keywords` as a query parameter on `POST /waves/v1/pulse/get_text`.

> Available features for Pre-Recorded Pulse STT API.