M-AILABS Speech Dataset

The M‑AILABS Speech Dataset is the first large‑scale free dataset we provide for both speech recognition and speech synthesis training. The data are primarily derived from LibriVox and Project Gutenberg, containing nearly a thousand hours of audio and aligned text files. Each segment is transcribed, ranging from 1 to 20 seconds. Texts were published between 1884 and 1964 and are in the public domain. Audio recordings are also public domain from the LibriVox project, except for Ukrainian recordings, which are supplied by Nash Format or Gwara Media and are intended solely for machine‑learning use.