| 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.

C-ORM: docs, API.

Last 100 entries

Credit Card Processing for Cat Soft LLC; Discover new movies on demand in our online cinema; Tasting; Credit Card Processing for Cat Soft LLC; Apple + Kiwi Jam; Hit Me; Increase Efficiency with GPS Vehicle Tracking for Cat Soft LLC; Sudoku - CSP + Chaos; Recycling Electronics In Santiago; Vector Displays in OpenGL; Call Center Services for Cat Soft LLC; And Anti-Aliased; OpenGL - Render via Intermediate Texture; And Garmin Connect; Using Garmin Forerunner 230 With Linux; Payroll Service Quotes for Cat Soft LLC; (Beating Dead Horse) StackOverflow; Current State of Justice in China; Now Is Cat Soft LLC's Chance To Save Up To 32% On Mail; Axiom of Determinacy; Ewww; Fee Chaos Book; Course on Differential Geometry; Increase Efficiency with GPS Vehicle Tracking for Cat Soft LLC; Okay, but...; Sparse Matrices, Deep Learning; Sounds Bad; Applebaum Rape; Tomato Chutney v4; Have to add...; Culturally Liberal and Nothing More; Weird Finite / Infinite Result; Your diamond is a beaten up mess; Maths Books; Good Bike Route from Providencia / Las Condes to Panul\; Iain Pears (Author of Complex Plots); Plum Jam; Excellent; More Recently; For a moment I forgot StackOverflow sucked; A Few Weeks On...; Chilean Book Recommendations; How To Write Shared Libraries; Jenny Erpenbeck (Author); Dijkstra, Coins, Tables; Python libraries error on OpenSuse; Deserving Trump; And Smugness; McCloskey Economics Trilogy; cmocka - Mocks for C; Concept Creep (Americans); Futhark - OpenCL Language; Moved / Gone; Fan and USB issues; Burgers in Santiago; The Origin of Icosahedral Symmetry in Viruses; autoenum on PyPI; Jars Explains; Tomato Chutney v3; REST; US Elections and Gender: 24 Point Swing; PPPoE on OpenSuse Leap 42.1; SuperMicro X10SDV-TLN4F/F with Opensuse Leap 42.1; Big Data AI Could Be Very Bad Indeed....; Cornering; Postcapitalism (Paul Mason); Black Science Fiction; Git is not a CDN; Mining of Massive Data Sets; Rachel Kaadzi Ghansah; How great republics meet their end; Raspberry, Strawberry and Banana Jam; Interesting Dead Areas of Math; Later Taste; For Sale; Death By Bean; It's Good!; Tomato Chutney v2; Time ATAC MX 2 Pedals - First Impressions; Online Chilean Crafts; Intellectual Variety; Taste + Texture; Time Invariance and Gauge Symmetry; Jodorowsky; Tomato Chutney; Analysis of Support for Trump; Indian SF; TP-Link TL-WR841N DNS TCP Bug; TP-Link TL-WR841N as Wireless Bridge; Sending Email On Time; Maybe run a command; Sterile Neutrinos; Strawberry and Banana Jam; The Best Of All Possible Worlds; Kenzaburo Oe: The Changeling; Peach Jam; Taste Test; Strawberry and Raspberry Jam; flac to mp3 on OpenSuse 42.1; Also, Sebald; Kenzaburo Oe Interview

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

A Framework for Managing a Music Collection

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

Date: Sat, 13 May 2006 18:26:57 -0400 (CLT)

I experimented last night, and had a hard time hearing differences between
different music formats.  I am also rapidly filling my laptop's disk (or
rather, that portion of it that I set aside for "personal" use, since it
is really work's machine).

Talking to a friend recently, he said that his ripped CDs were all that
remained of his music collection since his house was broken into.

Ripping music from a CD takes more time that cross-converting from flac to
ogg.


Taking all those points together it seems that a suitable solution would:
- allow cumulative ripping of CDs into a structured (flac encoded) library
- automatically cross-convert to a (lossy) compressed format(s)
- back-up the library to a second disk
- allow arbitrary selection and synchonization to other machines

Personally, I've been using kAudioCreator for ripping.  That creates a
nice directory structure of FLAC files.  rsynch can be used to mirror that
to a second disk.  rsynch can also be used to update a second machine from
a separate "selected" tree.

That leaves creating and selecting a tree of compressed data.  Since this
is significantly smaller than the flac tree it might as well co-exists. 
So an obvious partial solution is a process that regularly compares the
flacc and ogg trees and generates any missing ogg files.

Selection remains.  It seems that a third tree could be constructed, in
parallel to the ogg tree, using directories and links.  Building a
selection would involve deleting or creating the appropriate links.  This
would require a second app (perhaps a set of apps) that build this
cross-linked structure.

Andrew

Implemented as Python Scripts

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

Date: Mon, 22 May 2006 10:01:30 -0400 (CLT)

This is now implemented as a collection of Python scripts, called
MusicTree - http://www.acooke.org/jara/musictree/index.html

(actually, I think that tarball contains an error - if anyone is actually
thinking of downloading this before i repackage (like, in the next day or
two), email me....)

And a Radio Station!

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

Date: Mon, 22 May 2006 10:05:59 -0400 (CLT)

An I have a radio station too!  I've ripped a bunch of albums to disc and
used icecast and ices to play a constant stream taken from the entire
collection at random.  It's amazingly easy - now I need to see if I can
listen directly from La Serena...

Assorted Small Problems

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

Date: Thu, 25 May 2006 13:42:30 -0400 (CLT)

Bliss - listening to this fine from work.

Just two wrinkles so far:

1 - ices re-encodes data to ogg quality 3 by default (I assumed it would
pass data straight through).  Specifying a quality of 5 in the config
fixes this, but I worry it's uncompressing and re-compressing.  One of the
reasons to have the compressed files pre-processed was to save CPU.

2 - I had a "Copy Protected" CD.  The Thrills "SOm Much for the City".  A
little poking around on the wed (and the CD itself) shows that:

-- this is "protected" with something called Yucca;
-- that the implementation is via broken metadata in the ISO9660 format.
   Simple music players never read the data; sophisticated computer
   readers do, and get confused;
-- the effectiveness depends on the reader/reader firmware;
-- neither of the drives on my server worked; nor did the USB plexor, nor
   the drive in my work machine (all gave errors when trying to read data);
-- however, a recent Sony drive at work (in an ASL build 64bit box) read
   it no problem;
-- this is apparently illegal in the USA (and uncommon in Chile?);
-- this is popular in the UK and Europe (where I bought this CD).

Conclusion - I won't buy copy protected CDs in future.  In fact, if I want
one and it turnsout the only option is copy protected, I'll go looking for
a "pirate" copy instead.  This is just stupid.  I bought the damn thing!

Comment on this post