---
name: "hts_engine"
section: "1"
platform: "linux"
package: "htsengine"
version: "1.10-7+b2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/hts_engine"
---

# hts\_engine(1)

HMM-based speech synthesis engine

## NAME

hts\_engine — HMM-based speech synthesis engine

## SYNOPSIS

**hts\_engine** \[**options**\]  \[**infile**\]

## DESCRIPTION

This manual page documents briefly the  **hts\_engine** command.

This manual page was written for the **Debian** distribution  because the original program does not have a manual page.  Instead, it has documentation in the GNU       **Info** format; see below.

**hts\_engine** is a program that synthesize  speech waveform from HMMs trained by the HMM-based speech synthesis  system (HTS).

## OPTIONS

A summary of options is included below.

- **-m htsvoice**

  HTS voice files

- **-od s**

  filename of output label with duration

- **-om s**

  filename of output spectrum

- **-of s**

  filename of output Log F0

- **-ol s**

  filename of output low-pass filter

- **-or s**

  filename of output raw audio (generated speech)

- **-ow s**

  filename of output wav audio (generated speech)

- **-ot s**

  filename of output trace information

- **-vp**

  use phoneme alignment for duration

- **-i i f1 .. fi**

  enable interpolation & specify number(i),coefficient(f)

- **-s i**

  sampling frequency \[auto\]\[  1--   \]

- **-p i**

  frame period (point) \[auto\]\[  1--   \]

- **-a f**

  all-pass constant \[auto\]\[0.0--1.0\]

- **-b f**

  postfiltering coefficient \[0.0\]\[0.0--1.0\]

- **-r f**

  speech speed rate \[1.0\]\[0.0--   \]

- **-fm f**

  add half-tone \[0.0\]\[   --   \]

- **-u f**

  voiced/unvoiced threshold\[0.5\]\[0.0--1.0\]

- **-jm f**

  weight of GV for spectrum \[1.0\]\[0.0--   \]

- **-jf f**

  weight of GV for Log F0 \[1.0\]\[0.0--   \]

- **-z i**

  audio buffer size (if i==0, turn off) \[  0\]\[0--   \]

- **infile**

  label file

generated spectrum, log F0, and low-pass filter coefficient  sequences are saved in natural endian, binary (float) format.

## EXAMPLE

If you installed hts-voice-nitech-jp-atr503-m001 in the current  directory, the following command let you make a voice file from  input.lab:

```
% hts_engine -s 48000 -p 240 -a 0.55 \
-m nitech_jp_atr503_m001.htsvoice \
-ow output.wav \
input.lab
```

## AUTHOR

This manual page was written by Koichi Akabe vbkaisetsu@gmail.com for  the **Debian** system (and may be used by others).  Permission is  granted to copy, distribute and/or modify this document under  the terms of the GNU General Public License, Version 2 any  later version published by the Free Software Foundation.

On Debian systems, the complete text of the GNU General Public  License can be found in /usr/share/common-licenses/GPL.