Speech to Text API – High-Accuracy Speech Recognition SDK

Convert pre-recorded audio files or live WebSocket streams into clean text. Engineered for high accuracy with speaker diarization, word-level timestamps, and native Hinglish code-switching across 93+ languages.

Key Takeaways & Direct Summary: Speech to Text API

Direct Answer: YourVoic Speech to Text API provides developers with real-time WebSocket audio streaming and REST endpoints to transcribe speech with sub-180ms latency and 98% neural accuracy on Cipher Max. It features automatic speaker diarization, word-level timestamps, and native Hinglish code-switching across 93+ global languages.

  • Target Audience & Industry: Software engineers, AI agent developers, call center platforms, medical transcriptionists, and SaaS product teams.
  • Key Capabilities: REST file upload & WebSocket live stream APIs, 93+ languages, speaker diarization, and custom domain vocabulary.
  • Standards & Citations: Developed following W3C WebRTC Real-Time Audio Standards and evaluated using Google FLEURS Audio Datasets .
⚡ <180ms Streaming Latency🌐 93+ Languages & Hinglish🎙️ Speaker Diarization🎯 98% Cipher Max Accuracy🎁 2,500 API / 1,000 Web Free Credits

Try Speech to Text Transcriber Online

Upload an audio recording or click record to test real-time speech recognition.

⚡ Free Trial: 3 of 3 Free Transcriptions Left⏱️ Max 2 Minutes Per Audio File (Trimmed if longer)

1. Audio Input

Click to upload or drag & drop audio

MP3, WAV, M4A, FLAC (Max 25MB • Up to 2 mins audio)

OR

2. Model & Settings

3. Transcription Result

Your transcribed text will appear here

Upload an audio file (up to 2 mins) or record live speech to transcribe speech to text.

Direct Answer: A Speech to Text API is a cloud acoustic SDK that programmatically converts raw audio into text with sub-180ms latency, 98% neural accuracy, speaker diarization, and word timestamps.

  • Endpoints: REST API (`/transcribe`) and WebSocket Streaming (`/stream`).
  • Key Capabilities: Multi-speaker diarization, 93+ languages, Hinglish code-switching, zero-retention privacy.

What is a Speech to Text API?

Definition: A Speech to Text API (also known as a speech recognition API or audio transcription SDK) is a cloud interface that allows software developers to programmatically send audio streams or recorded files to a neural acoustic engine and receive real-time text transcripts, speaker labels, and word timestamps in JSON format.

Speech to Text API Technical Specifications & Feature Comparison

Feature / SpecificationYourVoic Speech to Text APILegacy Speech Recognition APIs
Streaming LatencySub-180ms real-time WebSocket frames800ms - 2,500ms buffering delay
Acoustic Model AccuracyUp to 98% accuracy on Cipher Max neural model82% - 88% WER on regional accents
Code-Switching SupportNative Hinglish (Hindi + English) & 93+ languagesFails on mixed-language audio streams
Speaker DiarizationAutomated multi-speaker timestamped labelsRequires expensive add-on processing
API Pricing Tier$0.002 / min (Cipher Fast) with 2,500 free credits$0.015 - $0.030 / min with mandatory retainers
Speech to Text API Dashboard & Integration Interface

Test the Speech to Text API Engine Live

Upload an audio file or record live microphone speech to test our speech recognition API accuracy in real time.

⚡ Free Trial: 3 of 3 Free Transcriptions Left⏱️ Max 2 Minutes Per Audio File (Trimmed if longer)

1. Audio Input

Click to upload or drag & drop audio

MP3, WAV, M4A, FLAC (Max 25MB • Up to 2 mins audio)

OR

2. Model & Settings

3. Transcription Result

Your transcribed text will appear here

Upload an audio file (up to 2 mins) or record live speech to transcribe speech to text.

Next-Gen Speech Recognition Architecture

Built for mission-critical voice applications, AI agents, call centers, and content platforms.

📡

Real-time Streaming & WebSockets

Stream live audio over WebSockets with ultra-low latency (<180ms) for real-time dictation, live captioning, and conversational AI voice bots.

🌏

Multilingual & Hinglish Code-Switching

Seamlessly transcribes mixed Hindi-English (Hinglish), Tamil, Telugu, and 93+ global languages without losing context or accuracy.

👥

Speaker Diarization

Automatically separate multi-speaker conversations into distinct labels (Speaker 1, Speaker 2) for podcasts, calls, and meetings.

⏱️

Word-Level & Segment Timestamps

Millisecond-accurate word and sentence segment timestamps for automated video subtitling (SRT/VTT) and synchronized audio playback.

🧠

Custom Domain Prompts

Guide the acoustic model with custom jargon prompts, brand names, medical terminology, and legal vocabulary for maximum domain accuracy.

🔒

Zero-Retention Privacy

Enterprise data protection. Audio streams and uploads are processed in memory and never stored or used to train public models.

Speech to Text SDK & Code Snippets

Integrate audio transcription into your codebase with ready-to-run REST and WebSocket examples.

Select AI Model:
# Install: pip install requests
import requests

url = "https://yourvoic.com/api/v1/transcription/transcribe"
headers = {
    "X-API-Key": "YOUR_API_KEY"
}

files = {
    "file": ("recording.mp3", open("recording.mp3", "rb"), "audio/mpeg")
}

data = {
    "model": "cipher_max",  # Options: cipher_max, cipher_fast
    "language": "auto",           # Supports 'hi', 'ta', 'te', 'en-US' or 'auto' for Hinglish code-switching
    "response_format": "verbose_json",
    "timestamp_granularities": "word,segment",
    "prompt": "Medical transcription"
}

response = requests.post(url, headers=headers, files=files, data=data)

if response.status_code == 200:
    result = response.json()
    print("Transcript:", result["text"])
    print("Detected Language:", result.get("language"))
    for segment in result.get("segments", []):
        print(f"[{segment['start']}s -> {segment['end']}s] {segment.get('speaker', 'Speaker')}: {segment['text']}")
else:
    print(f"Error {response.status_code}: {response.text}")

Speech to Text API Pricing

Pay only for the exact audio minutes transcribed. No hidden fees.

ModelMax Audio FileLatencyDiarizationPrice per Audio Min
Cipher Fast
Lowest latency acoustic model
25MB file / Stream~180msIncluded$0.002 / min
Cipher Max
Highest precision neural model
25MB file / Stream~250msIncluded$0.004 / min

Language Coverage & Regional Speech Recognition

Explore targeted speech-to-text models for Asia-Pacific, European, and American regional accents.

Hindi Speech to Text

Devanagari script & Hindi regional dialects

Telugu Speech to Text

Fluent Telugu audio transcription

Tamil Speech to Text

Native Tamil pronunciation transcription

Gujarati Speech to Text

Native Gujarati script audio transcription

Odia Speech to Text

Native Odia script audio transcription

Malayalam Voice Typing

Kerala phonetics & Chillaksharam support

Kannada Voice Typing

Karnataka regional dialect accuracy

Bengali Voice Typing

Bangla speech recognition

Marathi Voice Typing

Devanagari Marathi speech to text

Punjabi Voice Typing

Gurmukhi audio transcription

Urdu Voice Typing

Nasta'liq Urdu speech recognition

Assamese Speech to Text

Assamese speech recognition

Speech to Text API Frequently Asked Questions

Build with Speech to Text API Today

Get 2,500 free credits for API and 1,000 free credits for web interface on signup. Start transcribing live audio or batch files in minutes.

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