The LJ Speech
License: Custom


This is a public domain speech dataset consisting of 13,100 short audio clips of a single speaker reading passages from 7 non-fiction books. A transcription is provided for each clip. Clips vary in length from 1 to 10 seconds and have a total length of approximately 24 hours.

Data Collection

Total Clips 13,100
Total Words 225,715
Total Characters 1,308,678
Total Duration 23:55:17
Mean Clip Duration 6.57 sec
Min Clip Duration 1.11 sec
Max Clip Duration 10.10 sec
Mean Words per Clip 17.23
Distinct Words 13,821

Data Format

Metadata is provided in transcripts.csv. This file consists of one record per line, delimited by the pipe character (0x7c). The fields are:

  1. ID: this is the name of the corresponding .wav file
  2. Transcription: words spoken by the reader (UTF-8)
  3. Normalized Transcription: transcription with numbers, ordinals, and monetary units expanded into full words (UTF-8).

Each audio file is a single-channel 16-bit PCM WAV with a sample rate of 22050 Hz.


  author       = {Keith Ito and Linda Johnson},
  title        = {The LJ Speech Dataset},
  howpublished = {\url{}},
  year         = 2017



Data Summary
Provided by
Keith Ito
Hi! I'm Keith Ito, a software engineer in sunny San Diego.My interests include data visualization, mobile apps, and machine learning. But mostly, I just like writing code that people (hopefully) find useful.
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