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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

Lepl parser for Python.

Colorless Green.

Photography around Santiago.

SVG experiment.

Professional Portfolio

Calibration of seismometers.

Data access via web services.

Cache rewrite.

Extending OpenSSH.

C-ORM: docs, API.

Last 100 entries

Calling C From Fortran 95; Bjork DJ Set; Z3 Example With Python; Week 1; Useful Guide To Starting With IJulia; UK Election + Media; Review: Reinventing Organizations; Inline Assembly With Julia / LLVM; Against the definition of types; Dumb Crypto Paper; The Search For Quasi-Periodicity...; Is There An Alternative To Processing?; CARDIAC (CARDboard Illustrative Aid to Computation); The Bolivian Case Against Chile At The Hague; Clear, Cogent Economic Arguments For Immigration; A Program To Say If I Am Working; Decent Cards For Ill People; New Photo; Luksic And Barrick Gold; President Bachelet's Speech; Baltimore Primer; libxml2 Parsing Stream; configure.ac Recipe For Library Path; The Davalos Affair For Idiots; Not The Onion: Google Fireside Chat w Kissinger; Bicycle Wheels, Inertia, and Energy; Another Tax Fraud; Google's Borg; A Verion That Redirects To Local HTTP Server; Spanish Accents For Idiots; Aluminium Cans; Advice on Spray Painting; Female View of Online Chat From a Male; UX Reading List; S4 Subgroups - Geometric Interpretation; Fucking Email; The SQM Affair For Idiots; Using Kolmogorov Complexity; Oblique Strategies in bash; Curses Tools; Markov Chain Monte Carlo Without all the Bullshit; Email Para Matias Godoy Mercado; The Penta Affair For Idiots; Example Code To Create numpy Array in C; Good Article on Bias in Graphic Design (NYTimes); Do You Backup github?; Data Mining Books; SimpleDateFormat should be synchronized; British Words; Chinese Govt Intercepts External Web To DDOS github; Numbering Permutations; Teenage Engineering - Low Price Synths; GCHQ Can Do Whatever It Wants; Dublinesque; A Cryptographic SAT Solver; Security Challenges; Word Lists for Crosswords; 3D Printing and Speaker Design; Searchable Snowden Archive; XCode Backdoored; Derived Apps Have Malware (CIA); Rowhammer - Hacking Software Via Hardware (DRAM) Bugs; Immutable SQL Database (Kinda); Tor GPS Tracker; That PyCon Dongle Mess...; ASCII Fluid Dynamics; Brandalism; Table of Shifter, Cassette and Derailleur Compatability; Lenovo Demonstrates How Bad HTTPS Is; Telegraph Owned by HSBC; Smaptop - Sunrise (Music); Equation Group (NSA); UK Torture in NI; And - A Natural Extension To Regexps; This Is The Future Of Religion; The Shazam (Music Matching) Algorithm; Tributes To Lesbian Community From AIDS Survivors; Nice Rust Summary; List of Good Fiction Books; Constructing JSON From Postgres (Part 2); Constructing JSON From Postgres (Part 1); Postgres in Docker; Why Poor Places Are More Diverse; Smart Writing on Graceland; Satire in France; Free Speech in France; MTB Cornering - Where Should We Point Our Thrusters?; Secure Secure Shell; Java Generics over Primitives; 2014 (Charlie Brooker); How I am 7; Neural Nets Applied to Go; Programming, Business, Social Contracts; Distributed Systems for Fun and Profit; XML and Scheme; Internet Radio Stations (Curated List); Solid Data About Placebos; Half of Americans Think Climate Change Is a Sign of the Apocalypse; Saturday Surf Sessions With Juvenile Delinquents; Ssh, tty, stdout and stderr; Feathers falling in a vacuum; Santiago 30m Bike Route

© 2006-2015 Andrew Cooke (site) / post authors (content).

Airport Express + Linux (+ Ogg)

From: "andrew cooke" <andrew@...>

Date: Sat, 28 Oct 2006 17:11:41 -0300 (CLST)

So I just managed to get some sound out of the Airport Express by:

- plugging it in and connecting it to the hifi
- installing the supplied software on Pauli's (Apple) laptop
- configuring the airoport to join our local network
- finding the dynamic IP assigned to the airport via same software
- downloading and compiling JustePort
  http://nanocrew.net/software/justeport/
- piping a raw stream to JustePort, using
  ogg123 -d raw -f - foo.ogg | mono JustePort.exe - 10.2.0.232 0

And now I have Devendra Banhart crooning away as I type... :o)

Note that I needed a Mac to configure the airport, even though the final
streaming is done from Suse Linux.

I also tried to compile raop-play, but couldn't get configure to work
(googling shows others with similar problems)
http://sourceforge.net/projects/raop-play/

Andrew

Not so Express

From: "andrew cooke" <andrew@...>

Date: Sun, 29 Oct 2006 20:55:51 -0300 (CLST)

Hmmm.  The right channel disappears as the device warms up (as far as I
can tell).  Tried to return it to the local Apple shop today but (as is
stupidly normal here in Chile) the people who sell things aren't the ones
who take responsibility for fixing them.  Instead, it needs to go to a
service agent, and they don't open weekends, so hopefully Pauli can try
Monday.

Andrew

Further Details (SuSE, raop_play)

From: "andrew cooke" <andrew@...>

Date: Thu, 23 Nov 2006 08:16:17 -0300 (CLST)

We got this back yesterday, but when I went to try it JustePort failed to
connect.  It turned out that Dns.GetHostByName(Dns.getHostName()) was
failing.

Replacing "Dns.getHostName" by "0.0.0.0" fixed the problem (although not
in the way I expected - the whole block failed and local was assigned to
Host immediately after).  That made me realise that there was something
odd about my host name and, indeed, the bash prompt had been displaying an
odd host name (related to the DHCP name provided by my ISP) since my last
upgrade to SuSE.

Clicking around YAST I found that "Change Hostname via DHCP" was selected
in the Hostname and Name Server Configuration".  Deselecting that fixed
the problem with JustePort (ie the original code worked fine).

Meanwhile, I also managed to compile raop_play by (1) removing the test
for the id3 function from configure (just change the final "if" test to
"if [ 1 ]"); (2) playing around with CSSFLAGS and CFLAGS while running
make; (3) explicitly adding the library path for fltk into the Makefile. 
However, it then fails to work (the error is aex_nextplay:failed).  I'm
not sure if this is a related problem or not - it seems to find the
airport, but then it doesn't appear in the list of (what I assume should
be) available devices.

Anyway, JustePort works. :o)

Andrew

Use Logitech Squeeze (Slim Devices)

From: "andrew cooke" <andrew@...>

Date: Tue, 23 Dec 2008 09:54:59 -0300 (CLST)

This page still gets regular hits and sometimes I am contacted for source.

if you are looking to stream audio with Linux I would strongly recommend
that you give up on the Apple Airport and instead look at the Logitech /
Slimdevices - http://www.slimdevices.com/

I have more info on my "Boom" here -
http://www.acooke.org/cute/LogitechSq0.html

Andrew

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