> ENH: Generate Anki decks with {IPA symbols, Greek letters w/ LaTeX for math and science,

[0] https://mochi.cards

What we seem to need is high-quality speech recordings in any language (audiobooks are great) and some recordings for each target language which can be low-quality but need varied prosody/emotions (otherwise everything we generate will sound like an audiobook).

Not sure whether that's enough data for you. (If you need paired text for the LibriVox audiobooks, I can provide you with versions where I "fixed" the original text to match the audiobook content e.g. when someone skipped a line.)

I can recommend Elizabeth Klett as a good narrator. I've sampled her recordings of Jane Austen books Emma, pride and prejudice, and sense and sensibility.

Fixed transcripts would be nice although we need to align them with the audio really precisely (we cut the audio into 30 second chunks and we pretty much need to have the exact text in every chunk). It seems this can be solved with forced alignment algorithms but I have not dived into that yet.

E.g. for the True Story of Ah Q https://github.com/Yorwba/LiteratureForEyesAndEars/tree/mast... .align.json is my homegrown alignment format, .srt are standard subtitles, .txt is the text, but note that in some places I have [[original text||what it is pronounced as]] annotations to make the forced alignment work better. (E.g. the "." in LibriVox.org, pronounced as 點 "diǎn" in Mandarin.) Oh, and cmn-Hans is the same thing transliterated into Simplified Chinese.

The corresponding LibriVox URL is predictably https://librivox.org/the-true-story-of-ah-q-by-xun-lu/

https://github.com/espnet/espnet/blob/master/egs2/README.md