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Denormal Numbers In Floating Point Signal Processing
Applications
Analysis of the calculation slowness caused by denormal floating point
numbers, proposal of simple solutions to avoid them. A must-read for any
programmer willing to implement signal processing algorithms on personal
computer CPUs.
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PDF [English]
2005.04.19
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137 kB |
Les Nombres Dénormalisés Dans Les Applications De Traitement
Du Signal En Virgule Flottante
Analyse des ralentissement causés par les nombres
dénormalisés en virgule flottante, proposition de solutions
simples pour les éviter. Indispensable pour les développeureuses
désirant implémenter des algorithmes de traitement du signal sur
micro-ordinateur.
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PDF [Français]
2005.04.19
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152 ko |
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The Quest For The Perfect Resampler
This paper proposes a high quality, cheap and efficient solution for
resampling audio signals at variable rates. Primary target applications are
software synthesisers running on personal computers. Check my
Resampler C++ library for example source code.
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PDF [English]
2005.10.14
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771 kB |
À La Recherche Du Rééchantillonneur Parfait
Cet artcile propose une solution de haute qualité, peu coûteuse
et efficace pour le rééchantillonnage des signaux audio à
des taux variables. Les principales applications concernées sont les
synthétiseurs logiciels tournant sur des ordinateurs personnels. La
bibliothèque C++ Resampler en est un
exemple d'implémentation.
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PDF [Français]
2005.10.14
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798 ko |
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| Source code |
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Everything in this section is free of use, unless something different is
specified in the files. I would appreciate that you quote me if you are reusing
my work in your own projects. Thank you for reporting me any error or bug you
could found.
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| Audio related |
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FFTReal
A C++ and Delphi class computing FFT on vectors of real numbers and their
inverse FFT. Fairly optimized, free. Thanks to Frederic Vanmol for the
Delphi port. The v2 is a bit more sophisticated.
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v2.11
v2.00
v1.03
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59 kB
75 kB
14 kB |
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HIIR
A library in C++ for: 1. Changing the sampling rate of a signal by a factor
two, in both directions (upsampling and downsampling); 2. Obtaining two
signals with a π/2 phase difference (Hilbert transform). It is made of a
two-path polyphase IIR
filter, implemented with FPU, 3DNow! and SSE instruction sets.
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Download v1.00
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104 kB |
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Comprez2000 submission
My submission for the Comprez2000 competition. Goal: to generate automatically
a complete piece of music (PCM stereo file) with less than 5000 lines of C
source code. Shamefully, i2pi, the
competition organizer, gave up without giving any news.
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Download
Ogg Vorbis file
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23 kB
4524 kB |
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3DNow! biquad filter
An example of 2-pole IIR filtering with AMD 3DNow! instruction set. It
processes two signals at a time, as interleaved stereo stream. Quite fast:
7.75 cycles/sample. This is only a DF1 implementation of the 2nd order
equation in z-plane, not a full-featured filter designer. Inline assembly code
for MSVC++.
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Download
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2 kB |
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WAV file splitter
This program was intended to split .WAV files coming from sample-CD audio
tracks. Indeed these tracks often contain many sounds separated by silence.
It produces as much files, removing the silence parts. C++ source code.
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Download
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9 kB |
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AVR to WAV file converter
Converts Atari .AVR sound files into .WAV files. C code.
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Download
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3 kB |
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Graoumf Tracker 2
This is a music program (a soundtracker) for Windows, sequel of the
popular Graoumf Tracker on Atari. Unfortunately I never had time to finish
it, so I released the source code on
sourceforge.net. It's an awful mix
of C and C++, I was learning these languages at this time ! The current
version is working and usable, but some functions are still missing.
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Link on SF.net
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.AY files are music files from Amstrad CPC and Sinclair ZX Spectrum computers.
Based on the Zilog Z80 CPU + Yamaha AY-3-8910/8912 (also called PSG) soundchip
combination, they contain music data as well as the executable code required
to play it back on the original computer. The following programs are tools for
playing these tunes or helping people with good Z80 assembler knowledge to
extract music from CPC programs (you'll also need
AYMakeR and
CPCSNIP).
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| Other |
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Plitplot
A small C++ library for drawing figures into EPS vector files. Useful for
ploting nice-looking data and statistics directly from a program when
experimenting with algorithms.
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Download v1.01
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32 kB |
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Stopwatch
A C++ library for measuring time at the CPU clock level. It can profile
functions very accurately, and could help to optimise them. Very easy to use.
Currently for Windows, Linux x86 and MacOS.
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Download v1.02
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26 kB |
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SharedPtr - Smart pointer
C++ class of smart pointer. It behaves like a classic pointer, but counts the
references on the object and automatically destructs it when the last SharedPtr
has been destructed. No more delete needed. This class may drastically improve
your code reliability.
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Download
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2 kB |
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MS Visual C++ macros
I developed these VBScript macros for Ohm Force. They provide automatic header
generation for .h, .cpp and .hpp files, as well as intelligent function
comment templates - just fill the blanks. There is also a macro to turn
member function prototypes into well pre-filled functions with assert()ed
parameters, etc. They are adapted to the Ohm Force's code writing rules.
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Download
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9 kB |
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Degas Elite picture file converter
C++ code to convert a .PI1, .PI2 or .PI3 Degas Elite picture file (format
widely used on Atari ST) to a 256-color raw file format.
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Download
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4 kB |
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School schedule generator
This my 1st year project in C language at the French engineering shool
ISEP. It consists in generating automatically
a school schedule given realistic constraints, such as teacher disponibilities,
facilities, classroom/lab capacities, holidays, etc. C source, includes
documentation. Almost everything is in French language. Done with my friend
and classmate Eric Lalitte.
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Download
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88 kB |
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| Buzz machines |
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The files below are plug-ins (called machines) for the
Buzz music program by Oskari
Tammelin. I used Buzz a lot to experiment audio programming, because of its
modularity and ease of use. Some of them were proof of concept or early
prototypes for Ohm Force plug-ins. I
have publicly released only the most finished machines under the
FireSledge pseudonym.
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| Audio effects |
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| Instruments |
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| Music and sound |
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| Soundtracker modules |
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Soundtrackers were the first tools of the computer-only music era. They were
characterised by their austerity, making them look like hexadecimal hacking
programs, and their total lack of liveness. Conversely, they allowed ultra-fast
composing and great ease of use once mastered.
Well, below are quite old songs, and they are not very glorious... They are
listed in alphabetical order. Numbering of the Dreamxx songs is roughly
chronological. Some modules contain two complete songs, some contain a few
draft patterns at the end. Hopefully I have not published my earlier experiment
in musical field (musical, really ?), made with Quartet on Atari ST.
Unless specified explicitely, the files in this section are under the
Creative Commons
Attribution-NonCommercial-ShareAlike 2.5 License.
MOD = Classic ProTracker module,
GT2 = Graoumf Tracker
2 module,
BMX = Buzz module,
OGG = Ogg Vorbis sound files
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Blouba
This module was done originally for the diskzine HTC 4. It finally ended as a
demo song for Graoumf Tracker 2.
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GT2
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73 kB |
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Dream1
Probably my first MOD, composed with Noisetracker on my Atari STE. Includes 2
songs (pos 2D).
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MOD
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64 kB |
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Dream2
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MOD
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92 kB |
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Dream3
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MOD
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170 kB |
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Dream4
Draft patterns at the end (pos 40), but I never used them.
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MOD
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89 kB |
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Dream5
My first attempt at "metal" song imitations. Yes I have been young and
rebel... Sounds parodic now. Not very bright IMHO... I think it was the time
I switched to ProTracker.
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MOD
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51 kB |
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Dream6
A song featuring my voice with three monosyllabic vocal samples.
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MOD
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69 kB |
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Dream7
Another metal song, still pretty bad.
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MOD
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121 kB |
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Dream8
A very funny tune, mainly composed with laughters and screams.
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MOD
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165 kB |
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Dream9
I finally got decent samples for this metal song, sampling my own guitar. Even
the bass is a reworked guitar sample. 2 songs (pos 2C).
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MOD
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138 kB |
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Dream10
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MOD
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100 kB |
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Dream11
Draft patterns at position 2B, one was used later in a tune for
Radical Race (radrace5.gt2).
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MOD
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136 kB |
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Dream12
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MOD
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97 kB |
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Dream13
Song including the voice of the weather report TV speaker.
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MOD
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138 kB |
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Dream14
2 songs (pos 3C), the second one is a draft of dream14b.mod
(but a bit different).
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MOD
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253 kB |
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Dream14b
Draft patterns at pos 29, the last serie was used in
dream20.mod.
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MOD
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184 kB |
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Dream15
Very short song with a simple set of instrument, probably unfinished.
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MOD
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34 kB |
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Dream16
Very long song. Draft patterns at position 51, never used.
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MOD
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240 kB |
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Dream17
Two metal songs again (pos 16), becoming a bit darker, but still
funny, while looking back into the past...
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MOD
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148 kB |
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Dream18
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MOD
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111 kB |
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Dream19
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MOD
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112 kB |
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Dream20
Three songs in this module (pos 1A, 2F), the third one is
just a draft for dream22.gt2.
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MOD
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238 kB |
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Dream22
Two songs (pos 31), the second part is an attempt to recreate
Nirvana's "Milk It".
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GT2
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493 kB |
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Dream23
I remember this song was composed in a hurry.
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GT2
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65 kB |
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Gnotura
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GT2
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494 kB |
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Kalitamikomoo
Tune submitted to the module contest at the Place To Be IV coding party in
Mont de Marsan, France, 1996.
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GT2
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3274 kB |
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Les Maîtres du Monde
Dream22 revisited, this version is better I think.
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GT2
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839 kB |
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Le Millionnaire
Module adapted from a song I played with my band BiG NoZ : "Le
Millionnaire".
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GT2
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1805 kB |
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Poule-Piquet
This song is more recent.
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BMX
OGG
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1522 kB
5182 kB |
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Radical Race
6 modules I produced for the game
Radical
Race by the Pentagon team, published by Logitron. They are GT2 but are
restricted to MOD specifications because they were converted into this format
to be played by the game engine.
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GT2
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698 kB |
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Rhaaaaa !
Tune composed during the Faucon'Tact coding party in Alès, France,
1995, winner of the module competition.
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GT2
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540 kB |
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| Miscellaneous |
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Slam AGCS
Un petit texte sur l'AGCS
déclamé par quelques militant-e-s anti-pub et mixé par
votre serviteur. Musiques de fond:
1. Makunouchi Bento
- Peen (Himette EP),
2. Tao
- Heliotrope (Subtle EP, part 2),
3. Benfay
- Carbon (Carbon EP),
4. Antimateria vs Paolo
Veneziani - Ice Geometry (Ice Geometry EP)
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OGG
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4505 kB |
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| Add-ons for video games |
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Unless specified explicitely, the files in this section are under the
Creative Commons
Attribution-NonCommercial-ShareAlike 2.5 License.
Check the contained readme file for more information.
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| Maps for Quake Rally |
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I designed some tracks for
Quake Rally, an
add-on for Id Software's
Quake. Sources for
Worldcraft are
included, but there are probably some missing textures.
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Big Air
A track with a big big jump. It has been included in the official
Quake Rally: Leftovers
distribution under the name: qrally05.bsp.
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Download
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659 kB |
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Roll 47B
This map is just a try to see how can the car take banked corners. No health,
no jump, no weapon, no ammo, no brain. Just speed.
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Download
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468 kB |
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Turbinium Mines
Another track, quite long but not finished. Still playable in single player
mode.
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Download
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1369 kB |
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| Maps for Doom 2 |
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There files are for Id Software's
Doom 2.
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Deep Down in the Mouise
A large maze full of vicious traps build
around a huge arena with a lot of bunkers.
Find all the keys in the right order without
letting the army of darkness escape.
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Download
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72 kB |
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ISEP Doom
Une modélisation de mon ancienne école,
l'ISEP.
Cette version faite pour le deathmatch a été
présentée lors d'une campagne pour l'élection du boureau
des élèves.
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Download
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557 kB |
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BiG NoZ' Sounds
Not a map, but a crazy replacement for monster and player sounds.
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Download
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418 kB |
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| Miscellaneous |
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Sounds for Warcraft 2
Hilarious sound replacement for the Blizzard's
Warcraft 2 game. I'm not sure
it works with the new on-line edition.
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Download
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4511 kB |
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[Home]
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Website by Laurent de Soras, 2003-2013
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