What is Korean text to speech?

Korean text to speech (TTS) is technology that converts written Korean text into spoken audio. It's used to power voice agents, IVR systems, customer support automation, and any product where a voice agent needs to speak Korean naturally to a human caller.

What is the best Korean text to speech API for voice agents?

Sonic is purpose-built for real-time voice agent applications — with ~90ms time to first audio byte, native Korean prosody, and streaming architecture that doesn't degrade under load. For developers building production voice agents that need to speak Korean natively, Sonic is the fastest and most accurate option available.

How do I build a Korean voice agent with native-speaker quality?

Building a Korean voice agent with native-speaker quality requires a TTS model that is trained on how Korean is actually spoken. Sonic's Korean voices are calibrated on native speaker data, with prosody, rhythm, and cadence specific to Korean. Integrate via the Sonic API, select a Korean voice or clone your own, and the model handles tone, pacing, and emotional expression automatically.

What is the latency of Korean text to speech for real-time conversations?

Sonic delivers first audio bytes in ~90ms for Korean text to speech — fast enough for real-time conversational applications. Audio streams mid-synthesis, so the agent starts speaking before the full response is rendered. For voice agents, this means callers experience smooth conversational flow, akin to human speech.

Can I clone a Korean voice from a short audio sample?

Yes — Sonic's voice cloning creates a custom Korean voice from just 10 seconds of audio. The cloned voice inherits the full emotional range of the original speaker, with high speaker similarity maintained across every generation. Clone once and deploy across every interaction at any scale.

Can Sonic's Korean TTS handle different regional accents?

Yes. Sonic supports a range of regional Korean accents, with our model trained on native speakers from different locales. If your use case requires a specific regional accent, contact us to discuss your requirements.

How accurate is Korean text to speech for numbers, dates, and addresses?

Sonic natively handles structured data in Korean — phone numbers, dates, addresses, currency amounts, and ID numbers are all rendered the way native speakers say them, without preprocessing. This is critical for voice agents handling customer data, financial information, or logistics.

How do I integrate Korean text to speech into my application?

Sonic is accessible via three types of endpoints. The bytes endpoint delivers that stream as a single HTTP response body (the same pattern the playground uses). SSE and WebSocket stream too; they chunk audio into multiple events or messages, which is how per-chunk metadata such as timestamps is carried.

Does Sonic's Korean TTS support streaming?

Yes. Sonic is streaming-first — audio begins playing before the full response is rendered, with first bytes arriving in ~90ms. For real-time voice agent applications, this means the agent responds at conversational speed with no perceptible delay.

What audio formats does Sonic's Korean text to speech support?

Sonic supports RAW, PCM, MP3 and other standard audio formats. In general, we recommend using a consistent encoding and sample rate across your audio pipeline (telephony, playback, and storage) to avoid unnecessary transcoding and quality loss. For real-time voice agent applications, where audio output is sent over Twilio, we recommend µ-law encoding with an 8 kHz sample rate. For international telephone networks (G.711A), output audio formats are typically 8-bit A-law compressed PCM with an 8 kHz sample rate.

Is Korean text to speech suitable for enterprise voice agents?

Yes. Sonic is production infrastructure — dynamic auto-scaling handles millions of conversational minutes with 99.999% uptime and predictable latency at any volume. Enterprise deployments benefit from consistent performance whether handling ten concurrent calls or ten thousand.

Does Sonic's Korean TTS work for IVR and phone systems?

Yes. Sonic is optimized for telephony — audio quality and latency are tuned for phone-grade delivery, handling the compression and audio conditions of real call environments. Korean voice agents built on Sonic work across IVR systems, contact centre platforms, and direct telephony integrations.

What sets Sonic's Korean text to speech apart?

Sonic is the fastest and most natural text to speech model on the market. Combined with ~90ms streaming latency, native structured data handling, and voice cloning from 10 seconds of audio, Sonic is the only Korean TTS built specifically for production voice agent applications.

Native Korean Text to Speech

Sonic's Korean text to speech delivers natural rhythm, native prosody, and emotional expression that calibrates to the conversation. Build voice agents that earn trust from the first word.

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Generate Korean speech in seconds

Input your script, pick a voice, and stream production-ready audio — all in one place.

Step 1 — Input your Korean text

Provide Sonic with the text of your choice with our Text to Speech generator.

Step 2 — Choose a voice, generate in seconds

Pick a Korean voice that best fits your use case. Adjust pacing, volume, and pronunciations. Sub-90ms latency means you hear it almost as fast as you hit generate.