조선어음성합성프로그람 《청봉》3.2 (kttsproject) is a program that reads text aloud.

The kttsproject is our country's most excellent voice synthesis program, which won the honor of 1st place at the 17th National Program Contest and Exhibition in October Juche 95 (2006).

libktts-server is a server wrapper for this legacy TTS engine (kttsproject), allowing it to be used via a modern HTTP API.

https://libktts.yr32.net/

The easiest way to run libktts-server is using Docker, as it requires a specific 32-bit environment.

docker run -p 3000:3000 ghcr.io/yanorei32/libktts-server

You can configure the server using command-line arguments or environment variables.

Synthesizes text to speech.

Request:

{
  "text": "안녕하십니까?"
}

Response:

• Content-Type: audio/wav
• Body: WAV audio data.

If the text exceeds MAXIMUM_LENGTH, a 400 Bad Request is returned.

This project uses a multi-stage Docker build to run the 32-bit libktts binary on modern systems. The core library, libkttsproject-4.0-1.i386.rpm, was extracted from RedStar 3.0.

• Base: debian:trixie-slim
• Runtime: debian:squeeze (i386) environment extracted into the final image.
• Server: Rust (Axum) application acting as a bridge.

The server uses memfd_create to pass audio data from the legacy library to the HTTP response without writing to disk.