Teach Your AI to Listen and Speak with the World
Our Audio and Speech Annotation Services convert raw audio streams into labeled, intelligible data for AI with high-accuracy transcripts and annotations for speech recognition, voice biometrics, and audio analytics.
Turn Sound Into Intelligent Data
Power your voice AI with pristine audio annotation. From ASR training to voice biometrics, we deliver the precision your models demand—at scale, on time, every time.
Audio Transcription
99.5% AccuracyMedical-grade transcription across 50+ languages. We handle accents, technical jargon, and noisy environments that automated systems miss. Perfect for call centers, medical dictation, and voice assistant training.
Precise Timestamping
Millisecond PrecisionWord-level and phoneme-level alignment that makes your ASR models understand timing. Critical for real-time applications, subtitle generation, and voice-to-text synchronization.
Speaker Diarization
Multi-Speaker IDKnow who said what. Our experts separate overlapping conversations, identify speaker changes, and maintain speaker consistency across hours of audio. Essential for meeting transcription and call analytics.
Phonetic Annotation
IPA StandardsDetailed phoneme labeling and prosody marking for next-gen TTS systems. We capture stress, intonation, and pronunciation variants that make synthetic voices sound human.
Sound Event Detection
500+ Sound TypesBeyond speech: we tag environmental sounds, music, silence, and acoustic events. Train smart home devices to recognize doorbells, alarms, or specific machinery sounds.
Audio Enhancement
AI-Powered CleanupTransform poor recordings into training-ready data. We remove background noise, balance levels, and enhance clarity while preserving authentic speech characteristics.
Enterprise-Grade Audio Infrastructure
Our audio pipeline combines professional DAWs, custom annotation tools, and rigorous quality control. Every project undergoes triple verification: automated checks, expert review, and client validation. We've processed over 100,000 hours of audio across industries—from healthcare dictation to automotive voice commands—maintaining ISO-compliant security throughout.
Powering Every Industry with Audio AI
From autonomous vehicles to healthcare diagnostics, our audio annotation drives breakthrough AI applications across sectors.
Voice Assistants & Smart Speakers
Train the next Alexa or Siri. We've processed 100K+ hours of multi-accent voice data for tech giants, enabling 95% command accuracy across 50+ languages.
Call Center Intelligence
Transform customer interactions into insights. Our speaker diarization and sentiment labeling help Fortune 500 companies reduce call times by 25% and boost satisfaction scores.
Media & Broadcasting
Automate content production. Our real-time captioning and metadata tagging cut post-production time by 66%, making content instantly searchable and accessible.
Automotive Voice Control
Enable hands-free driving. We annotate in-cabin audio with road noise, helping automakers achieve 92% command accuracy even at highway speeds.
Research & Academia
Advance human knowledge. From cognitive assessment via speech patterns to linguistic preservation projects, we support groundbreaking research with precise phonetic annotation.
Healthcare & Medical AI
Save lives with AI. Our HIPAA-compliant medical transcription and diagnostic audio annotation help detect early signs of respiratory diseases with 89% accuracy.
Real Expertise. Real Results.
No inflated metrics. No empty promises. Just consistent, quality audio annotation backed by human intelligence and proven processes.
Human Intelligence
Native speakers with domain expertise handle your audio—not automated tools that miss context and nuance.
Flexible Scaling
From 100 hours to 10,000+, we adapt to your needs without compromising quality or timelines.
Your Data, Protected
GDPR-compliant processes with encrypted transfers and controlled access. Your audio never leaves secure channels.
Our Proven Process
Stop Training AI on Bad Transcripts
- Real humans annotating, not automated transcription
- Domain experts who understand technical context
- Scale from 100 to 10,000 hours without quality drops
Let's discuss your annotation needs. No sales pitch, just solutions.
Train Voice AI That Understands Context
From speaker diarization to phonetic labeling—our audio experts capture the nuances that matter. Perfect transcription for call centers, voice assistants, and medical dictation across 100+ languages.
HIPAA & GDPR compliant • Call center expertise • Native speaker annotators
Need Audio Data Collection?
We also provide custom audio recording and collection services to create training datasets from scratch.
Explore Audio Data CollectionHow We Deliver Superior Audio Data
Our annotation infrastructure combines proven tools with human expertise, delivering up to 5x faster throughput while maintaining accuracy standards your models demand.
Annotation Platform
Cloud-based infrastructure built for audio annotation at scale, with specialized tools for transcription and labeling.
- Multi-format support: WAV, MP3, FLAC, M4A
- Real-time review and consensus workflows
- Keyboard shortcuts for 3x faster annotation
- Role-based access control and audit trails
Quality Control System
Multi-layer verification ensuring consistency and accuracy across all annotations.
- Automated consistency checks for formatting
- Inter-annotator agreement tracking
- Random sampling for quality audits
- Error tracking and feedback integration
AI-Assisted Workflows
Pre-annotation with AI reduces manual effort by 40-70% while maintaining human oversight for quality.
- Auto-transcription for initial drafts
- Active learning optimizes annotation workflows
- Speaker diarization pre-processing
- Human verification for all AI outputs
How Your Project Works
Discovery & Setup
We analyze your audio samples, define annotation guidelines, and set up custom workflows tailored to your specific requirements.
1-2 daysPilot Batch
We annotate a small sample (100-500 files) for your review. This ensures alignment on quality standards before scaling.
2-3 daysProduction & QA
Full-scale annotation with continuous quality monitoring. Regular updates and the ability to adjust guidelines as needed.
OngoingDelivery & Iteration
Annotated data delivered in your preferred format (JSON, CSV, XML). We incorporate feedback for continuous improvement.
48hr standardReady to Build Voice AI That Works?
Stop training your models on poorly transcribed audio. Our human-verified annotation delivers the accuracy your speech recognition, voice assistants, and audio analytics need to perform in the real world.
Your Audio Data is Sacred to Us
We understand that audio data often contains sensitive information—from medical consultations to financial discussions. Our security infrastructure ensures your data never leaves protected channels.
Compliance & Certifications
We maintain strict compliance with international data protection regulations. All annotators sign comprehensive NDAs and undergo security training before accessing any project data.
Security Infrastructure
- End-to-End Encryption 256-bit AES encryption for data at rest and TLS 1.3 for data in transit
- Access Control Role-based permissions with multi-factor authentication and IP whitelisting
- Data Isolation Each project in separate encrypted containers with no cross-contamination
- Audit Logging Complete activity tracking with immutable logs for compliance reporting
- Data Retention Control Automatic deletion after project completion or custom retention policies