> ## Documentation Index
> Fetch the complete documentation index at: https://docs.gladia.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Pre-recorded Features

> Core features of the Gladia Pre-recorded STT API

The core functionality of the Gladia API is its Speech Recognition model, designed to convert spoken language into written text. Additional capabilities like diarization, summarization, translation, custom prompts and more can be enabled by adding parameters to your request.

> **[Speaker Diarization](/chapters/pre-recorded-stt/features/speaker-diarization.md)**
>
> Detect speakers and understand who said what, and when.

> **[PII Redaction](/chapters/audio-intelligence/pii-redaction.md)**
>
> Automatically redact names, emails, vehicle IDs, and other PII in pre-recorded transcripts.

> **[Export subtitles (SRT/VTT)](/chapters/pre-recorded-stt/features/subtitles.md)**
>
> Generate ready-to-use subtitle files in SRT or VTT formats.

> **[Custom vocabulary](/chapters/pre-recorded-stt/features/custom-vocabulary.md)**
>
> Boost recognition accuracy for brand, product, and domain terms by matching how they sound (phoneme-based).

> **[Custom spelling](/chapters/pre-recorded-stt/features/custom-spelling.md)**
>
> Replace specific text variants with your preferred spelling.

> **[Enhanced punctuation](/chapters/pre-recorded-stt/features/enhanced-punctuation)**
>
> Improved punctuation and casing for cleaner, easier-to-read transcripts.

> **[Sentences](/chapters/audio-intelligence/sentences.md)**
>
> Group words into sentences with timing for better readability and parsing.

> **[Name consistency](/chapters/pre-recorded-stt/features/name-consistency)**
>
> Enforce consistent rendering of speaker and entity names.

> **[Mono and stereo channels](/chapters/limits-and-specifications/multiple-channels.md)**
>
> Transcribe mono or stereo audio (up to 2 channels) with channel-aware processing.

> **[Speaker Diarization](/chapters/audio-intelligence/speaker-diarization.md)**
>
> Detect speakers and understand who said what, and when.

> **[Export subtitles (SRT/VTT)](/chapters/audio-intelligence/subtitles.md)**
>
> Generate ready-to-use subtitle files in SRT or VTT formats.

> **[Custom vocabulary](/chapters/audio-intelligence/custom-vocabulary.md)**
>
> Fix mis-transcribed words by matching how they sound (phoneme-based).

> **[Custom spelling](/chapters/audio-intelligence/custom-spelling.md)**
>
> Replace specific text variants with your preferred spelling.

> **[Custom metadata](/chapters/audio-intelligence/custom-metadata.md)**
>
> Attach and propagate metadata to organize and trace your jobs.

> [!TIP]
>
> Want to know more about the audio intelligence features? Check out our [Audio Intelligence](/chapters/audio-intelligence) chapter.


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