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pettarin
forced-alignment-tools
Python2019–2020
pettarin / forced-alignment-tools

forced-alignment-tools

A collection of links and notes on forced alignment tools.

Productivity
Explore on GitHubRead Hacker News discussions
4Distinct people
4Mentions
0Explicit recommenders
946GitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

A collection of links and notes on forced alignment tools.

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

No other repository is repeatedly linked in the same discussions.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:56:07 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by month4 dated mentions

Observed mentions: 2019-02-25 21:36:46 UTC to 2020-03-08 12:49:16 UTC.

0122019-02-01 00:00:00 UTC to 2019-03-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 commentsFeb 20192019-03-01 00:00:00 UTC to 2019-04-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2019-04-01 00:00:00 UTC to 2019-05-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2019-05-01 00:00:00 UTC to 2019-06-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2019-06-01 00:00:00 UTC to 2019-07-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2019-07-01 00:00:00 UTC to 2019-08-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2019-08-01 00:00:00 UTC to 2019-09-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 commentsAug 20192019-09-01 00:00:00 UTC to 2019-10-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2019-10-01 00:00:00 UTC to 2019-11-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2019-11-01 00:00:00 UTC to 2019-12-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2019-12-01 00:00:00 UTC to 2020-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2020-01-01 00:00:00 UTC to 2020-02-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2020-02-01 00:00:00 UTC to 2020-03-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2020-03-01 00:00:00 UTC to 2020-04-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 commentsMar 2020

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
Feb 20192019-02-01 00:00:00 UTC2019-03-01 00:00:00 UTC101
Mar 20192019-03-01 00:00:00 UTC2019-04-01 00:00:00 UTC000
Apr 20192019-04-01 00:00:00 UTC2019-05-01 00:00:00 UTC000
May 20192019-05-01 00:00:00 UTC2019-06-01 00:00:00 UTC000
Jun 20192019-06-01 00:00:00 UTC2019-07-01 00:00:00 UTC000
Jul 20192019-07-01 00:00:00 UTC2019-08-01 00:00:00 UTC000
Aug 20192019-08-01 00:00:00 UTC2019-09-01 00:00:00 UTC000
Sep 20192019-09-01 00:00:00 UTC2019-10-01 00:00:00 UTC000
Oct 20192019-10-01 00:00:00 UTC2019-11-01 00:00:00 UTC000
Nov 20192019-11-01 00:00:00 UTC2019-12-01 00:00:00 UTC000
Dec 20192019-12-01 00:00:00 UTC2020-01-01 00:00:00 UTC000
Jan 20202020-01-01 00:00:00 UTC2020-02-01 00:00:00 UTC101
Feb 20202020-02-01 00:00:00 UTC2020-03-01 00:00:00 UTC000
Mar 20202020-03-01 00:00:00 UTC2020-04-01 00:00:00 UTC202

What Hacker News says

4 sources
gliese1337·Mar 8, 2020
I actually have very little direct experience with automated forced alignment; I have enough experience in the space to know that naive approaches suck, but back when my boss was paying people to do manual alignment most of the effort went into second-language subtitles for pedagogical studies... which means the text doesn't actually represent the same words that are in the audio, because they're words in a different language, and nothing would do a good job of accurately aligning that! So I got very little support for building in a more sophisticated auto-alignment system. My intuition, however, is that a meet-in-the-middle approach using automatic speech recognition and then aligning the resulting text streams would be the optimal approach, and indeed every other major forced-alignment tool besides aeneas (https://github.com/pettarin/fo
Read the rest
rced-alignment-tools) does seem to use that approach. The catch, of course, is that you actually need decent ASR language models for every target language to make that work, and gas you can see from tat list, it is rare for any given engine to support more than a few languages; CMU Sphinx probably has the widest support, although it's not the highest end toolkit for popular languages like English. So, if you really want to maintain the broadest possible language support, and you can afford the API fees, building a new alignment engine that piggy-backs on MicroSoft or IBM's speech recognition APIs is probably the best option--or, to keep it cheap I'd go ahead and use Sphinx's aligner as a preferred option for all the languages that it has models for, and either fall back on aeneas for remaining languages, or (if you can afford occasional API calls to commercial services for the occasional less-popular language) upgrade to MicroSoft/IBM services for the remaining languages.
In Show HN: Karaoke for any song in any language
icer2020·Jan 27, 2020
Hi, tsukikage, It works more effectively on subtitle segments with initial inaccurate timecodes and gaps (non-speech) in between. The scenario you described is equivalent to when you have a sequence of words with no associated timecodes. Subaligner is not implemented for tacking this problem but it has incorporated forced alignment at the second aligning stage. This feature is experimental and only for English atm but feel free to give it a go. There is a nice summary of forced-alignment tools if you only have a sequence of words as the input: https://github.com/pettarin/forced-alignment-tools
In Show HN: Subaligner – Re-sync and align out-of-sync subtitles to your video

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