| Andrew Cooke | Contents | Latest | RSS | Twitter | Previous | Next

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

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.

Last 100 entries

LPIR - Steganography in Practice; How I Am 6; Clear Explanation of Verizon / Level 3 / Netflix; Teenage Girls; Formalising NSA Attacks; Switching Brakes (Tektro Hydraulic); Naim NAP 100 (Power Amp); AKG 550 First Impressions; Facebook manipulates emotions (no really); Map Reduce "No Longer Used" At Google; Removing RAID metadata; New Bike (Good Bike Shop, Santiago Chile); Removing APE Tags in Linux; Compiling Python 3.0 With GCC 4.8; Maven is Amazing; Generating Docs from a GitHub Wiki; Modular Shelves; Bash Best Practices; Good Emergency Gasfiter (Santiago, Chile); Readings in Recent Architecture; Roger Casement; Integrated Information Theory (Or Not); Possibly undefined macro AC_ENABLE_SHARED; Update on Charges; Sunburst Visualisation; Spectral Embeddings (Distances -> Coordinates); Introduction to Causality; Filtering To Help Colour-Blindness; ASUS 1015E-DS02 Too; Ready Player One; Writing Clear, Fast Julia Code; List of LatAm Novels; Running (for women); Building a Jenkins Plugin and a Jar (for Command Line use); Headphone Test Recordings; Causal Consistency; The Quest for Randomness; Chat Wars; Real-life Financial Co Without ACID Database...; Flexible Muscle-Based Locomotion for Bipedal Creatures; SQL Performance Explained; The Little Manual of API Design; Multiple Word Sizes; CRC - Next Steps; FizzBuzz; Update on CRCs; Decent Links / Discussion Community; Automated Reasoning About LLVM Optimizations and Undefined Behavior; A Painless Guide To CRC Error Detection Algorithms; Tests in Julia; Dave Eggers: what's so funny about peace, love and Starship?; Cello - High Level C Programming; autoreconf needs tar; Will Self Goes To Heathrow; Top 5 BioInformatics Papers; Vasovagal Response; Good Food in Vina; Chilean Drug Criminals Use Subsitution Cipher; Adrenaline; Stiglitz on the Impact of Technology; Why Not; How I Am 5; Lenovo X240 OpenSuse 13.1; NSA and GCHQ - Psychological Trolls; Finite Fields in Julia (Defining Your Own Number Type); Julian Assange; Starting Qemu on OpenSuse; Noisy GAs/TMs; Venezuela; Reinstalling GRUB with EFI; Instructions For Disabling KDE Indexing; Evolving Speakers; Changing Salt Size in Simple Crypt 3.0.0; Logarithmic Map (Moved); More Info; Words Found in Voynich Manuscript; An Inventory Of 3D Space-Filling Curves; Foxes Using Magnetic Fields To Hunt; 5 Rounds RC5 No Rotation; JP Morgan and Madoff; Ori - Secure, Distributed File System; Physical Unclonable Functions (PUFs); Prejudice on Reddit; Recursion OK; Optimizing Julia Code; Cash Handouts in Brazil; Couple Nice Music Videos; It Also Works!; Adaptive Plaintext; It Works!; RC5 Without Rotation (2); 8 Years...; Attack Against Encrypted Linux Disks; Pushing Back On NSA At IETF; Summary of Experimental Ethics; Very Good Talk On Security, Snowden; Locusts are Grasshoppers!; Vagrant (OpenSuse and IDEs); Interesting Take On Mandela's Context; Haskell Cabal O(n^2) / O(n) Fix; How I Am 4

© 2006-2013 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

Comment on this post