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MTG
essentia
C++2019–2022
MTG / essentia

essentia

C++ library for audio and music analysis, description and synthesis, including Python bindings

Creative & MediaSearch & Information RetrievalLibraries & SDKs
Explore on GitHubRead Hacker News discussions
2Distinct people
3Mentions
0Explicit recommenders
3.8KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

C++ library for audio and music analysis, description and synthesis, including Python bindings

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 month3 dated mentions

Observed mentions: 2019-10-28 18:55:32 UTC to 2022-04-01 09:28:30 UTC.

012019-10-01 00:00:00 UTC to 2019-11-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 commentsOct 20192019-11-01 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): 0 mentions; 0 submissions, 0 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): 0 mentions; 0 submissions, 0 comments2020-04-01 00:00:00 UTC to 2020-05-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2020-05-01 00:00:00 UTC to 2020-06-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2020-06-01 00:00:00 UTC to 2020-07-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2020-07-01 00:00:00 UTC to 2020-08-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2020-08-01 00:00:00 UTC to 2020-09-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2020-09-01 00:00:00 UTC to 2020-10-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2020-10-01 00:00:00 UTC to 2020-11-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2020-11-01 00:00:00 UTC to 2020-12-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2020-12-01 00:00:00 UTC to 2021-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-01-01 00:00:00 UTC to 2021-02-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 commentsJan 20212021-02-01 00:00:00 UTC to 2021-03-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-03-01 00:00:00 UTC to 2021-04-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-04-01 00:00:00 UTC to 2021-05-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-05-01 00:00:00 UTC to 2021-06-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-06-01 00:00:00 UTC to 2021-07-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-07-01 00:00:00 UTC to 2021-08-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-08-01 00:00:00 UTC to 2021-09-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-09-01 00:00:00 UTC to 2021-10-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-10-01 00:00:00 UTC to 2021-11-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2021-11-01 00:00:00 UTC to 2021-12-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-12-01 00:00:00 UTC to 2022-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-01-01 00:00:00 UTC to 2022-02-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-02-01 00:00:00 UTC to 2022-03-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-03-01 00:00:00 UTC to 2022-04-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-04-01 00:00:00 UTC to 2022-05-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 commentsApr 2022

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
Oct 20192019-10-01 00:00:00 UTC2019-11-01 00:00:00 UTC101
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 UTC000
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 UTC000
Apr 20202020-04-01 00:00:00 UTC2020-05-01 00:00:00 UTC000
May 20202020-05-01 00:00:00 UTC2020-06-01 00:00:00 UTC000
Jun 20202020-06-01 00:00:00 UTC2020-07-01 00:00:00 UTC000
Jul 20202020-07-01 00:00:00 UTC2020-08-01 00:00:00 UTC000
Aug 20202020-08-01 00:00:00 UTC2020-09-01 00:00:00 UTC000
Sep 20202020-09-01 00:00:00 UTC2020-10-01 00:00:00 UTC000
Oct 20202020-10-01 00:00:00 UTC2020-11-01 00:00:00 UTC000
Nov 20202020-11-01 00:00:00 UTC2020-12-01 00:00:00 UTC000
Dec 20202020-12-01 00:00:00 UTC2021-01-01 00:00:00 UTC000
Jan 20212021-01-01 00:00:00 UTC2021-02-01 00:00:00 UTC000
Feb 20212021-02-01 00:00:00 UTC2021-03-01 00:00:00 UTC000
Mar 20212021-03-01 00:00:00 UTC2021-04-01 00:00:00 UTC000
Apr 20212021-04-01 00:00:00 UTC2021-05-01 00:00:00 UTC000
May 20212021-05-01 00:00:00 UTC2021-06-01 00:00:00 UTC000
Jun 20212021-06-01 00:00:00 UTC2021-07-01 00:00:00 UTC000
Jul 20212021-07-01 00:00:00 UTC2021-08-01 00:00:00 UTC000
Aug 20212021-08-01 00:00:00 UTC2021-09-01 00:00:00 UTC000
Sep 20212021-09-01 00:00:00 UTC2021-10-01 00:00:00 UTC000
Oct 20212021-10-01 00:00:00 UTC2021-11-01 00:00:00 UTC101
Nov 20212021-11-01 00:00:00 UTC2021-12-01 00:00:00 UTC000
Dec 20212021-12-01 00:00:00 UTC2022-01-01 00:00:00 UTC000
Jan 20222022-01-01 00:00:00 UTC2022-02-01 00:00:00 UTC000
Feb 20222022-02-01 00:00:00 UTC2022-03-01 00:00:00 UTC000
Mar 20222022-03-01 00:00:00 UTC2022-04-01 00:00:00 UTC000
Apr 20222022-04-01 00:00:00 UTC2022-05-01 00:00:00 UTC101

What Hacker News says

3 sources
jcelerier·Apr 1, 2022
> Yes, if you don't know Rust, and you think it's just a weird re-skin of C++ that can be gsub'd from one to another, you're going to have a bad time. most C++ code is not "idiomatic C++" either, it's code which looks like this: https://github.com/cdemel/OpenCV/blob/master/modules/calib3d... or this https://github.com/madronalabs/madronalib/blob/master/source... or this https://github.com/MTG/essentia/blob/master/src/3rdparty/spl... etc ... which is in general code from science papers written in pseudocode which is ported at 2AM by tired astrophysics or DSP masters students to have something to show to their advisor. You can have whatever abstraction you want but they won't be used because the point is not to write rust or C++ or anything but to get some pseudo-MATLABish thing to run ASAP, and that won't have anything that looks like rang
Read the rest
e / span, only arrays being indexed raw.
In The wild world of non-C operating systems
jcelerier·Oct 31, 2021
If you wrote a software that worked with soundflower it means that at some point you used to call either the CoreAudio API directly or any abstraction on top of it (RtAudio, PortAudio, ...). Thus harder to port to another OS :-) Here the idea is to write the algorithms in a way that is more future-proof, by not having them to depend on any run-time API, just a generic specification (given as a set of C++20 concepts). This way the algorithms will still be useful in 10 years when everyone has moved to API N+1, unlike a metric ton of existing audio software which depends on a specific audio / media-object API for no good reason (today ! When they were written C++ wasn't advanced enough to allow this at all) - all the objects in https://github.com/pcastine-lp/LitterPower for instance - all the algorithms in https://github.com/MTG/essentia/tre
Read the rest
e/master/src/algorithms - ditto for https://github.com/cycfi/q/tree/master/q_lib/include/q - ditto for all the VCV algorithms: https://github.com/VCVRack/Fundamental/tree/v1/src - ditto for all the Bespoke objects: https://github.com/BespokeSynth/BespokeSynth/tree/main/Sourc... - ditto for all the LMMS plugins: https://github.com/LMMS/lmms/tree/master/plugins etc etc, there's a couple hundred of those, which always depend on some API and are thus not easily portable across environments: if tomorrow you want to make an audio software and want to use one of the, say, VCVRack plug-ins you're going to have to bring the whole VCV run-time API along. Related projects are Faust (https://faust.grame.fr/) and SOUL (https://juce.com/discover/stories/soul-first-public-beta-rel...) but they both are domain-specific languages with their own compilers. I wanted a pure-C++ thing instead, which allows to call directly native code, and enables more than just generic audio processing: unlike Faust and SOUL (last time I checked) it's possible to make a message-based object for Pd or Max, not just an audio filter or synthesizer. My end goal for this is that when I make an object for the main software I'm developing, ossia score (https://ossia.io) then the whole media arts community can benefit :-)
In Declarative, non-intrusive, compile-time C++ reflection for audio plug-ins
johnsoft·Oct 28, 2019
The API was an Echo Nest API. Spotify acquired Echo Nest and shut down all their APIs in 2016. I'd love to see the app live on too! Spotify's API has similar functionality[1] to the old Echo Nest API, for now at least. (But I don't know if it returns all the same data.) Or, if you don't want to rely on Spotify, I bet Essentia[2][3] could do the job just as well. Essentia is the open-source brains behind AcousticBrainz[4]. So you could either use Essentia directly, or grab the data from the AcousticBrainz API. [1] https://developer.spotify.com/documentation/web-api/referenc... [2] https://github.com/MTG/essentia [3] https://essentia.upf.edu/documentation/essentia_python_examp... [4] https://acousticbrainz.org/
In Looping Music Seamlessly

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