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Laurent de Soras
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Welcome, this ugly thing is my homepage. To browse, click on the tabs located
on the top.
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HIIR 1.50
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2024-08-09 |
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I updated the HIIR library to v1.50.
The main addition is the 64-bit floating point NEON implementation for
AArch64.
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Domain change
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2024-08-02 |
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This website was down for a week, most likely because of a technical failure
at the hosting service level (free.fr).
However there is no simple way to contact the technical support when you are
not a paying customer.
I run this website for more than 25 years (started on Mygale.org) and this is
the prefect opportunity to switch to another host, making more sense from a
political point of view.
So the new address is a bit simpler, this is now
https://ldesoras.fr.
Please update your bookmarks !
The new hosting service is Ouvaton.
And we now have TLS (the https thing), although it doesn’t bring much for a
website made only of static pages without sensible data, but some web browsers
are reluctant to use the old http mode.
The downside : I’ll have to check all the external pages
referencing the old address to update it, or contact the admins to make them
change it.
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Audio input and output modules
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2024-06-19 |
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I’m releasing today
several
building blocks for interfacing an audio processing board with the outside
world, via audio connectors.
This is a collection of small modular boards for buffering audio inputs and
driving output lines, with several types of connectors (XLR, jack).
I had these files for a long time on my computer but there was a bit of work
needed to clean them up for a public release, so obviously I procrastinated a
few years before giving them an appropriate treatment…
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Underpass EP + Pédale Vite updates
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2024-05-02 |
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My band Sound of the Void just released a new 6-track EP, called
Underpass.
Make sure to check it out!
As usual, all the music is free (as in “free beer” and “free speech”).
Pédale Vite had also
benefited from significant updates recently, it now runs a Raspberry Pi 5 and
the rotary encoders have been replaced by endless potentiometers, for smoother
action.
Upgrading to Pi 5 was a lot of work (hardware is completely different),
increasing the major version number to v3, but because the physical appearance
hasn’t changed, I still mention it as a v2 on this website.
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Picogen
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2023-08-29 |
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I built a signal generator called Picogen
around a Raspberry RP2040 microcontroller used as a DAC.
Full schematics and code included.
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Daisy Seed
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2023-06-09 |
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I added a new section in the source code page with tools for the
Daisy Seed, an embedded platform for audio processing.
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Flight case
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2023-01-23 |
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Pas beaucoup de nouveautés dernièrement !
Je viens de concevoir et defabriquer un flight
case pour Pédale Vite.
Détails ici.
Pendant ce temps je m’éternise sur une modification du logiciel interne qui me
pemettra de placer facilement des simulateurs d’ampli en sortie sans interférer
avec les programmes d’effets.
À suivre…
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C++ file templates
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2022-06-02 |
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I ported my file template generator for C++ source to a
VSIX extension for VS2019, written
in C#.
It was previously a set of Visual Basic macros but worked only with
VS2005.
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ChickenDream
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2022-04-11 |
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ChickenDream is a new plug-in for Vapoursynth and Avisynth+.
It emulates film grain using a realistic model, described in the following papers: here and here.
It gives stunning results, especially with coarse grain, where usual grain generation algorithms fail hard.
However the results have to be balanced with the highly CPU-intensive processing.
I also updated fmtconv, now using
Vapoursynth API v4.
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Cass&Tord
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2022-04-02 |
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Another music project: Cass&Tord.
We recorded an EP earlier in January in Trash Palace Studio, it is now
available on the band website.
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Updates for fmtconv
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2021-10-30 |
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I spent the last few weeks updating fmtconv,
notably by adding a plug-in for Avisynth+ and
improving the HDR support.
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Graoumf Tracker 2 r26
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2021-07-27 |
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Another Graoumf Tracker 2 update, this time
with a surprise contribution from long-time user David L.
So now there are at least two GT users across the world for this
25+ years-old piece of software.
Also fmtconv has been updated to r23.
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Graoumf Tracker 2 r25
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2021-03-14 |
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Quick update for the very dusty Graoumf Tracker 2.
JB/dDash asked me a functionnality to load dozens of samples in a single click.
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More updates
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2020-10-10 |
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There is a new release of the HIIR library
again (v1.32).
I also released updated versions of the
Dither (v1.28.0) filters set for
AviSynth as well as the MVTools (v2.6.1.0)
and AVSTP (v1.04).
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HIIR library updated to v1.31
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2020-07-15 |
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The HIIR library now includes a function to
desgin a half-band filter with a requirement on the group delay.
This is useful to get integer group delay values (in samples) that can be
easily compensated when mixing processed and unprocessed signals.
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Nouvel article : Introduction aux filtres numériques à topologie préservée
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2020-04-23 |
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J’ai pondu un petit article sur la
conception de filtres numériques modélisés à partir de circuits analogiques.
Le sujet est évidemment très vaste et l’article en égratigne à peine la
surface.
Toutefois il devrait donner suffisamment d’outils, de méthodes et de pistes
pour commencer à coder des filtres réalistes.
Je voulais surtout présenter des méthodes alternatives à la BLT classique,
tout en rendant compréhensible un sujet sur lequel il existe peu de
ressources simples destinées aux novices, allant droit au but.
C’est une sorte de marche intermédiaire entre le sol de ce bas monde et les
annexes techniques très formalisées des simulateurs de circuits comme Spice
ou Qucs.
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HIIR library updated to v1.30
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2020-03-13 |
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For this Friday the 13rd, the HIIR library
got a major update.
It now supports double (64-bit float) operations.
There are SSE2 and AVX implementations, thanks to Dario Mambro.
I took the opportunity to add AVX-512 support, as well as missing
parallel N-channel implementations for the Hilbert phaser.
I improved a few things with the SSE and NEON single-channel resamplers, too.
I checked compatibility and performances with the most recent compilers
on Intel and ARM platforms.
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Older news...
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