Embed audio intelligence
in your product
Professional-grade DSP engine, AI transcription, and text-to-speech — available as an embeddable JavaScript SDK. Runs entirely client-side via Web Audio API. Zero server load, zero per-minute fees.
Three engines, one SDK
DSP Engine
Professional audio processing pipeline
- Volume boost up to 800% with look-ahead limiter
- 10-band parametric EQ (20Hz - 20kHz)
- 3-band Linkwitz-Riley crossover (250Hz / 4kHz)
- Per-band compression with auto-ratio
- Noise reduction (biquad + RNNoise)
- Under 10ms processing latency
Transcription Engine
Whisper-powered speech-to-text
- 90+ languages with auto-detection
- Real-time streaming or batch processing
- Word-level timestamps
- SRT, VTT, and JSON output formats
- ~150 MB model, cached in browser
- Runs on WebGPU (Chrome 113+)
Voice Engine
Natural text-to-speech synthesis
- Kokoro TTS — near-ElevenLabs quality
- 7 languages, multiple voice presets
- 82M parameters, ~160 MB download
- 24kHz audio output
- Streaming or batch generation
- Runs entirely client-side
Simple, powerful API
A few lines of JavaScript to add professional audio enhancement to any web application.
import { HearablySDK } from '@hearably/sdk';
// Initialize with your API key
const hearably = new HearablySDK({ apiKey: 'hby_...' });
// Enhance any audio element
const enhancer = hearably.enhance(audioElement, {
volumeBoost: 4.0, // 400% boost
eq: 'voice-clarity', // Preset or custom bands
noiseReduction: true, // Enable denoising
limiter: { ceiling: -1 } // dBFS ceiling
});
// Real-time transcription
const captions = await hearably.transcribe(audioElement, {
language: 'auto', // Auto-detect language
onSegment: (seg) => console.log(seg.text)
});Client-side by design
The entire SDK runs in the browser. No audio is sent to any server. This means zero server costs, zero latency, and zero privacy concerns for your users.
Web Audio API
DSP engine uses native Web Audio API nodes (BiquadFilter, DynamicsCompressor, AudioWorklet) for near-zero latency processing. No WASM overhead for core audio.
WebGPU Inference
AI models (Whisper, Kokoro) run via WebGPU for GPU-accelerated inference. Falls back to WASM on unsupported devices. Models are downloaded once and cached.
Web Workers
All AI inference runs in Web Workers off the main thread. Your UI stays responsive while transcription and TTS process in the background.
Zero Server Load
Since everything runs client-side, your infrastructure costs stay flat regardless of usage. No audio processing servers, no GPU instances, no scaling concerns.
Built for product teams
Video Conferencing Platforms
Embed volume boost, noise reduction, and voice clarity directly into your conferencing app. Give users per-participant audio control without any server-side processing.
E-Learning Platforms
Add live captions and audio enhancement to your LMS. Meet ADA/WCAG requirements with a single SDK integration. Students get personal audio controls on every piece of content.
Podcast & Media Platforms
Offer AI transcription, auto-captioning, and audio mastering as features of your platform. Replace server-side processing with client-side SDK — eliminate per-minute API costs.
Accessibility Solutions
Build assistive technology products with professional-grade audio enhancement. Hearing-adaptive EQ, live captions, and voice boost — all accessible via a clean API.
Flexible licensing for every scale
Starter
Pay per monthly active user. Ideal for products with variable or growing usage. Volume discounts at scale.
- DSP Engine (all features)
- Up to 10,000 MAU
- Email support
- Standard SLA
Growth
Flat monthly fee, unlimited users. Predictable costs for products with established user bases.
- DSP + Transcription Engines
- Unlimited MAU
- Priority support (24h SLA)
- Custom branding
Enterprise
Full platform access with dedicated support. White-label, custom models, and on-premise deployment options.
- All three engines
- Unlimited MAU
- Dedicated account manager
- Custom SLA & support
- Source code escrow
Add audio intelligence to your product
Professional DSP, AI transcription, and TTS — all running client-side. Zero server load, zero per-minute fees.
Request API AccessInclude your use case and estimated MAU. We'll respond within 24 hours.