In the next blog post i'll be posting my findings about Fons Adriaensen's Aeolus Pipe Organ synthesizer. I'll will try to explain to myself and the internet, the entire process of generating convincing pipe organ sounds.
The first batch of information is something that seems easy but it's not that way: Where is the last release of Aeolus located? Here (It requires some other libraries, like The stops, zita-alsa-pcmi-0.2.0.tar.bz2, clthreads-2.4.0.tar.bz2 and clxclient-3.9.0.tar.bz2)
The last release, 0.9.0, is pretty recent, and from the README, the changelog is:
AEOLUS 0.9.0 RELEASE NOTES 30/06/2013
============================
Maintenance release.
* Replaced libalsadrv by libzita-alsa-pcmi
* Changed license to GPL3
Next I'll be taking notes about Aeolus general architecture.
Wednesday, September 18, 2013
Thursday, February 21, 2013
Unofficial Vatican TV Player for Linux: How to see the last days of BXVI as Pontiff in Linux
Given the important events happening today on the Vatican State, and the difficulty of watching the Vatican player on Linux (Silverlight version not compatible with moonlight), I'm building a simpler version that runs on a somewhat standard Linux distribution (Requires Moonlight and possibly the media codecs).
See how to install Moonlight
Right now it only plays the live signal of the CTV(You have to press play twice, seeing the pause symbol on the play button), but I plan to add the archives as well. Please let me know of any inconveniences, or if a better solution exists.
The URL: http://bit.ly/YJGbcm
See how to install Moonlight
Right now it only plays the live signal of the CTV(You have to press play twice, seeing the pause symbol on the play button), but I plan to add the archives as well. Please let me know of any inconveniences, or if a better solution exists.
The URL: http://bit.ly/YJGbcm
Saturday, April 21, 2012
Optimizing the performance of Gcc compiled programs for BeagleBoard
Researching the various ways to optimize the compilation programs for BeagleBoard, I've come with the following parameters for GCC:
-O3 -fomit-frame-pointer -mfloat-abi=softfp -mfpu=neon -mcpu=cortex-a8 -ftree-vectorize -ffast-math
At the moment they are the best parameters we could get. Maybe you have aditional parameters you use to speed the resulting program's performance?Improving Beagleboard capture speed on OpenCV
It seems that the capture routines of OpenCV don't perform so well on the Beagleboard. Our tests were really disappointing, with 2-3 fps on our low vision project.
We had to develop a custom optimized capture mechanism, which retrieves the raw YUYV frames, extracts the Y components, and works from there.
This allow us to grab at full camera speed at 640x480 for a Logitech Pro9000 camera, and we are optimizing to get the full resolution, 1600x1200. Apparently SDL can be used to grab frames with improved speed, this is something we didn't consider.
PS: To have better information, see my next post
We had to develop a custom optimized capture mechanism, which retrieves the raw YUYV frames, extracts the Y components, and works from there.
This allow us to grab at full camera speed at 640x480 for a Logitech Pro9000 camera, and we are optimizing to get the full resolution, 1600x1200. Apparently SDL can be used to grab frames with improved speed, this is something we didn't consider.
PS: To have better information, see my next post
Saturday, July 26, 2008
The Leibniz-Newton controversy
Studying the aspects that gave origin to the well known Differential and Integral Calculus right now.
The Royal Society Committee , which analyzed Leibniz plagiarism charges, and the two bands that emerged from it, are really a sign that the human race doesn't change too much through the centuries, and it takes a bit the mystic halo science has, showing that science is also a man business, specially observing Newton's actions, of almost supra human image in the eyes of some, and not really brilliant in the mentioned case.
It also comes as a conclusion that giving the unique authorship of Calculus to one unique person is at least very unfair, seeing the clear traces of preliminary works coming from the Greeks, and there is a list of really big names with fundamental works as Fermat, Descartes, Hooke, etc.
The Royal Society Committee , which analyzed Leibniz plagiarism charges, and the two bands that emerged from it, are really a sign that the human race doesn't change too much through the centuries, and it takes a bit the mystic halo science has, showing that science is also a man business, specially observing Newton's actions, of almost supra human image in the eyes of some, and not really brilliant in the mentioned case.
It also comes as a conclusion that giving the unique authorship of Calculus to one unique person is at least very unfair, seeing the clear traces of preliminary works coming from the Greeks, and there is a list of really big names with fundamental works as Fermat, Descartes, Hooke, etc.
Friday, May 16, 2008
Ruby midi-speech synthesis crossover
Some days ago I had to somehow show all the sound of a .sf2 soundbank file. This can be a really boring and time consuming task.
So I hacked together a ruby script that says the sound number through MS Sapi, and quickly generated a scale midi file with changed instrument, and play it through Windows services, everything from register 1 to 99. It saved me a couple of hours maybe, and was indeed fun.
A little excerpt (recorded from a cheap microphone due to an integrated soundcard's inhability) can be found here
The employed libraries were midilib and win32-sapi .
So I hacked together a ruby script that says the sound number through MS Sapi, and quickly generated a scale midi file with changed instrument, and play it through Windows services, everything from register 1 to 99. It saved me a couple of hours maybe, and was indeed fun.
A little excerpt (recorded from a cheap microphone due to an integrated soundcard's inhability) can be found here
The employed libraries were midilib and win32-sapi .
NumRu, scientific Ruby the easy way
From it's ruby-lang description page:
NumRu is a suite of libraries and applications for numerical modeling, data analysis, and visualization produced by the Dennou Ruby project of the GFD Dennou Club.
It's a complete ruby distribution with many scientific library bindings included. I used it to mockup a new matrix-form daubechies filters mockup I want to implement on a GPU (using brook). The gsl wavelet package had a bug, so I had to use a Debian VM to contrast, but if you want a hole scientific toolbox in a convenient installer, It can be an option.
NumRu is a suite of libraries and applications for numerical modeling, data analysis, and visualization produced by the Dennou Ruby project of the GFD Dennou Club.
It's a complete ruby distribution with many scientific library bindings included. I used it to mockup a new matrix-form daubechies filters mockup I want to implement on a GPU (using brook). The gsl wavelet package had a bug, so I had to use a Debian VM to contrast, but if you want a hole scientific toolbox in a convenient installer, It can be an option.
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