ai-coustics | Audio intelligence

Cleaner input. Smarter output.

Voice Focus removes background noise and other voices. The transcript keeps only what the speaker said. Turn it on and off to hear the difference.

Sample · Robot

0:00 / 0:00

Voice Focus

Quail Voice Focus

I would like to uh, order a robot, please. A robot? What do you want with a robot? Oh, that would be super practical to have a robot. It could be in multiple places at the same time. You know what's the best place to build your voice agent?

10%

Word error rate

Background words removed

Try it free

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Turn unpredictable audio into reliable, production-ready speech

Voice AI is only as strong as its foundation.

Input audio

LLM

TTS

ai-coustics audio reliability layer

STT

Audio input: real-world chaos

Background chatter, clipped calls and unpredictable environments.

Audio input: real-world chaos

Background chatter, clipped calls and unpredictable environments.

Your models perform flawlessly

Cleaner input means higher ASR accuracy, smarter VAD, and steadier LLM.

Your models perform flawlessly

Cleaner input means higher ASR accuracy, smarter VAD, and steadier LLM.

We enhance in real-time

Our SDK enhances, isolates, and balances speech in under 10ms.

We enhance in real-time

Our SDK enhances, isolates, and balances speech in under 10ms.

Your Voice AI shines

From ASR to TTS, every block in your pipeline performs like it’s built to.

Your Voice AI shines

From ASR to TTS, every block in your pipeline performs like it’s built to.

Bad audio breaks voice agents

Benchmark-leading performance in real-world conditions where audio quality matters most.

Benchmarks

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Up to 43% fewer word errors

Quail keeps agents responsive even in noisy-environments.

Outperforms Silero VAD

In accuracy, balance, and reliability.

30ms latency

Executes real-time inference at 8 and 16 kHz PCM for seamless calls.

Built by audio engineers

Trained on real-world acoustic variability by audio and ML experts for reliable performance in live production systems.

500 types of noise

Handles 500+ noise types spanning stationary, non-stationary, and impulsive interference - delivering clarity at scale.

> 1M types of room

Trained on over a million acoustic environments, from anechoic chambers to reverberant spaces.

Deployed worldwide

Processing millions of minutes weekly across 187 countries and 150+ languages.

Case studies

How Voice AI teams ship faster and perform better with audio intelligence as their foundation.

Voice agents · Enterprise
PolyAI reduced false barge-ins by 40% and short-utterance failures by 30% across 2,000+ enterprise deployments in 75 languages.
Voice agents · Enterprise
telli scaled to 5 million calls with enterprise-grade reliability, cutting the audio failures that cost 5–8x to escalate to a human.
Voice cloning · AI avatars
Synthesia achived cleaner voice clones, stable speaker identity, and a simpler modeling pipeline - just by fixing audio at the source.
Creator tools · VST3
Elgato now provides tudio-quality sound for millions of creators, running entirely on CPU, no audio engineering required.

PolyAI

telli

Synthesia

Elgato

Voice agents · Enterprise

PolyAI reduced false barge-ins by 40% and short-utterance failures by 30% across 2,000+ enterprise deployments in 75 languages.

Read case study

PolyAI

telli

Synthesia

Elgato

Voice agents · Enterprise

PolyAI reduced false barge-ins by 40% and short-utterance failures by 30% across 2,000+ enterprise deployments in 75 languages.

Read case study

One SDK. Integrated in minutes.

Lightweight and fast: 30ms latency, no GPU needed, no ONNX dependency.

Built for your stack

Native integrations for every major framework.

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Drop-in

Try for free now in our Developer Platform

Test models, generate SDK keys and deploy from one dashboard.

Test now

Drop-in

Try for free now in our Developer Platform

Test models, generate SDK keys and deploy from one dashboard.

Test now

Drop-in

Try for free now in our Developer Platform

Test models, generate SDK keys and deploy from one dashboard.

Test now

Meet our models

Best-in-class speech enhancement engineered for accuracy, reliability, and scale.

Quail

Speech-to-Text Primer

Speech enhancement designed to improve STT accuracy across challenging environments. Reduce your Word Error Rate by as much as 30%.

Learn more

Quail

Speech-to-Text Primer

Speech enhancement designed to improve STT accuracy across challenging environments. Reduce your Word Error Rate by as much as 30%.

Learn more

Quail VAD

Voice Activity Detection

Stronger, more robust VAD, designed to work without separate de-noising tools. Ensure your voice agent hears everything, even in complex, real-world environments.

Learn more

Quail VAD

Voice Activity Detection

Stronger, more robust VAD, designed to work without separate de-noising tools. Ensure your voice agent hears everything, even in complex, real-world environments.

Learn more

Quail Voice Focus

Voice Isolation

Suppress competing voices and isolate your foreground speaker for the best voice agent results. Audio enhancement built for real-world acoustics.

Learn more

Quail Voice Focus

Voice Isolation

Suppress competing voices and isolate your foreground speaker for the best voice agent results. Audio enhancement built for real-world acoustics.

Learn more

Quail Voice Focus

Voice Isolation

Suppress competing voices and isolate your foreground speaker for the best voice agent results. Audio enhancement built for real-world acoustics.

Learn more

Powering leading voice stacks

Trusted by Voice AI teams to deliver production-ready speech enhancement in real-time.

"The adoption process was effortless. It was engineer to engineer on Slack. No bureaucracy. Just real conversations and fast progress."
Stephan Nöthen
Principal Product Architect, Elgato
"ai-coustics effectively mitigates reverb, clipping, and compression artifacts, making high standards easy."
Chris Guse
CEO, BosePark Productions GmbH
"The integration was super quick and easy. Across our Voice Agents, we see major performance improvements in turn-taking as well as audio understanding. Highly recommended for any voice-first product."
Jeremy Meidinger
Founder / CTO, HiDesk
"With ai-coustics on, we've had the best customer satisfaction scores of all the tests we've done."
Razvan Kusztos
VP of Engineering, PolyAI
"Voice cloning is highly sensitive to acoustic inconsistencies. Using ai-coustics to clean audio upstream simplifies modeling and keeps speaker identity stable."
Adam Froghyaria
Senior Research Engineer, Synthesia

"The adoption process was effortless. It was engineer to engineer on Slack. No bureaucracy. Just real conversations and fast progress."
Stephan Nöthen
Principal Product Architect, Elgato
"ai-coustics effectively mitigates reverb, clipping, and compression artifacts, making high standards easy."
Chris Guse
CEO, BosePark Productions GmbH
"The integration was super quick and easy. Across our Voice Agents, we see major performance improvements in turn-taking as well as audio understanding. Highly recommended for any voice-first product."
Jeremy Meidinger
Founder / CTO, HiDesk
"With ai-coustics on, we've had the best customer satisfaction scores of all the tests we've done."
Razvan Kusztos
VP of Engineering, PolyAI
"Voice cloning is highly sensitive to acoustic inconsistencies. Using ai-coustics to clean audio upstream simplifies modeling and keeps speaker identity stable."
Adam Froghyaria
Senior Research Engineer, Synthesia