C[omp]ute

Welcome to my blog, which was once a mailing list of the same name and is still generated by mail. Please reply via the "comment" links.

Always interested in offers/projects/new ideas. Eclectic experience in fields like: numerical computing; Python web; Java enterprise; functional languages; GPGPU; SQL databases; etc. Based in Santiago, Chile; telecommute worldwide. CV; email.

Personal Projects

Choochoo Training Diary

Last 100 entries

Surprise Paradox; [Books] Good Author List; [Computing] Efficient queries with grouping in Postgres; [Computing] Automatic Wake (Linux); [Computing] AWS CDK Aspects in Go; [Bike] Adidas Gravel Shoes; [Computing, Horror] Biological Chips; [Books] Weird Lit Recs; [Covid] Extended SIR Models; [Art] York-based Printmaker; [Physics] Quantum Transitions are not Instantaneous; [Computing] AI and Drum Machines; [Computing] Probabilities, Stopping Times, Martingales; bpftrace Intro Article; [Computing] Starlab Systems - Linux Laptops; [Computing] Extended Berkeley Packet Filter; [Green] Mainspring Linear Generator; Better Approach; Rummikub Solver; Chilean Poetry; Felicitations - Empowerment Grant; [Bike] Fixing Spyre Brakes (That Need Constant Adjustment); [Computing, Music] Raspberry Pi Media (Audio) Streamer; [Computing] Amazing Hack To Embed DSL In Python; [Bike] Ruta Del Condor (El Alfalfal); [Bike] Estimating Power On Climbs; [Computing] Applying Azure B2C Authentication To Function Apps; [Bike] Gearing On The Back Of An Envelope; [Computing] Okular and Postscript in OpenSuse; There's a fix!; [Computing] Fail2Ban on OpenSuse Leap 15.3 (NFTables); [Cycling, Computing] Power Calculation and Brakes; [Hardware, Computing] Amazing Pockit Computer; Bullying; How I Am - 3 Years Post Accident, 8+ Years With MS; [USA Politics] In America's Uncivil War Republicans Are The Aggressors; [Programming] Selenium and Python; Better Walking Data; [Bike] How Fast Before Walking More Efficient Than Cycling?; [COVID] Coronavirus And Cycling; [Programming] Docker on OpenSuse; Cadence v Speed; [Bike] Gearing For Real Cyclists; [Programming] React plotting - visx; [Programming] React Leaflet; AliExpress Independent Sellers; Applebaum - Twilight of Democracy; [Politics] Back + US Elections; [Programming,Exercise] Simple Timer Script; [News] 2019: The year revolt went global; [Politics] The world's most-surveilled cities; [Bike] Hope Freehub; [Restaurant] Mama Chau's (Chinese, Providencia); [Politics] Brexit Podcast; [Diary] Pneumonia; [Politics] Britain's Reichstag Fire moment; install cairo; [Programming] GCC Sanitizer Flags; [GPU, Programming] Per-Thread Program Counters; My Bike Accident - Looking Back One Year; [Python] Geographic heights are incredibly easy!; [Cooking] Cookie Recipe; Efficient, Simple, Directed Maximisation of Noisy Function; And for argparse; Bash Completion in Python; [Computing] Configuring Github Jekyll Locally; [Maths, Link] The Napkin Project; You can Masquerade in Firewalld; [Bike] Servicing Budget (Spring) Forks; [Crypto] CIA Internet Comms Failure; [Python] Cute Rate Limiting API; [Causality] Judea Pearl Lecture; [Security, Computing] Chinese Hardware Hack Of Supermicro Boards; SQLAlchemy Joined Table Inheritance and Delete Cascade; [Translation] The Club; [Computing] Super Potato Bruh; [Computing] Extending Jupyter; Further HRM Details; [Computing, Bike] Activities in ch2; [Books, Link] Modern Japanese Lit; What ended up there; [Link, Book] Logic Book; Update - Garmin Express / Connect; Garmin Forerunner 35 v 230; [Link, Politics, Internet] Government Trolls; [Link, Politics] Why identity politics benefits the right more than the left; SSH Forwarding; A Specification For Repeating Events; A Fight for the Soul of Science; [Science, Book, Link] Lost In Math; OpenSuse Leap 15 Network Fixes; Update; [Book] Galileo's Middle Finger; [Bike] Chinese Carbon Rims; [Bike] Servicing Shimano XT Front Hub HB-M8010; [Bike] Aliexpress Cycling Tops; [Computing] Change to ssh handling of multiple identities?; [Bike] Endura Hummvee Lite II; [Computing] Marble Based Logic; [Link, Politics] Sanity Check For Nuclear Launch; [Link, Science] Entropy and Life

Identifying Artists with EchoNest

From: andrew cooke <andrew@...>

Date: Wed, 6 Feb 2013 18:55:09 -0300

I am trying to identify artists using EchoNest's API
- http://developer.echonest.com/

The simplest way is to simply call artists/search, but I am not 100% confident
in the mp3 metadata that I am using.  So I wanted something more robust, if
possible.

My data (music) is grouped into albums, but unfortunately EchoNest don't
expose albums in their interface.  And I have enough data that using
fingerprinting seemed like it would be inefficient.  So I have ended up with
the following heuristic, which seems to work well:

 * Note whether an album is single-artist (ie if the same artist is on
   all tracks).

 * Try to find the tracks on the album using song/search, specifying both
   artist name and song title.

   * For single-artist albums, you can set the artist for the entire
     album on the first successful track identification.

   * For multi-artist albums you need to take each track individually
     (I could be smarter, as I don't handle the case where there are
     multiple artists, but each artist has several tracks).

 * If any artists remain unidentified, use artist/search.

 * For single-artist albums, where the artist is *still* unidentified,
   use song/search and request the top 15 results for each track name.
   For each result, filter so that any artists returned are mentioned just
   once.  Then combine results and take the most popular artist (if
   mentioned more than once).

The reasons this works well are:

 * The first step uses track info to get a more reliable artist ID.

 * The last step identified artists when the mp3 metadata is confused 
   (eg Jazz albums where the artist is a long list of names).

Andrew

Example Voting Results

From: andrew cooke <andrew@...>

Date: Wed, 6 Feb 2013 19:36:35 -0300

Both good and bad, for your entertainment.  ID3 first, followed by the
identification (in the order generated by my file scan).

 Safar Barlik -> Fairuz
   Not sure what happened here - I don't know wnough about Egyptian music
   to make much sense of this one.

 Duke Ellington, Charles Mingus, Max Roach -> Duke Ellington
 Mulatu Astatke and his Ethiopian Quintet -> Mulatu Astatke
 Bappi, Uthup, Mithun -> Bappi Lahiri
 Jaco Pastorius, Pat Metheny, Bruce Ditmas & Paul Bley -> Paul Bley
   All these are working nicely.  The final aim is to link related
   music, so this level of accurcay is fine.

 Robert Fripp, Andrew Keeling & David Singleton -> Sarah Brightman
   Surreal.  That's going to produce some "interesting" playlists.

 2Sentidos -> Pereza
   Wrong - perhaps suffering from poor Spanish language support in the
   EchoNest database?

 Bill Frisell, Ron Carter & Paul Motian -> Bill Frisell
   Another success.

 Panavizion series -> Mychael Danna
 Hammeriver -> Michael Jackson
   Depressing.

 Keren Ann & Erik Truffaz -> Keren Ann
 Jan Garbarek Brahem Hussain -> Jan Garbarek
   Seems to work best with lists of jazz artists...

 Tape & Bill Wells -> Johann Pachelbel
   What can you expect when all tracks are called "Fugue"?!

 Edu Lobo & Nara Leao & Tamba Trio -> Elis Regina
  Again, I wonder if EchoNest is lacking foreign language tracks?
  These are both brazillian.

 Edie Brickell & New Bohemians -> Edie Brickell
 Ricardo Modegro y Paco de Lucia -> Ricardo Modrego

So, that's 9/16 - about 50% success.  Which isn't bad when the vast majority
of albums are handled by the simpler heuristiucs.

Andrew

Comment on this post