[PlanetCCRMA] jcgui/guitarix/jconvolver/space-net.org.uk (was Re: new packages in Fedora updates-testing (2010-03-13)

Niels Mayer nielsmayer at gmail.com
Wed Mar 17 12:21:50 PDT 2010

 ...  wow...
i didn't think i'd see stuff this cool available open-source, already. Is
this progress, or just patent expiration?? This is sorta like having a free
pass to all those fancypants windows/mac plugins
<http://www.audioease.com/>you see in the catalogs and are never going
to buy or try unless you do it
at a loud&annoying tradeshow or music store (or in college)... the ability
to experiment, patch&try, find out about other people's uses and
ideas,...actually more like priceless...

Here's a few jconvolver-related tips:

(0) Guitarix is a really nice way of using jconvolver. Despite the name, It
doesn't break or malfunction in any way when used with a synth or sampler
:-) and very well-integrated w/ jack.

A new Fedora release is now available w/ even more
cool features (thanks Orcan!):

guitarix-0.06.0-1.fc12 enhancement update
Release:Fedora 12
Update ID:FEDORA-2009-13623
Date Released:2009-12-24 20:16:48

add Midi learn (by Andreas Degert)
add internal direct convolution unit with 7 filter kernel (amp models)
add LADI level1 support
add a new light skin
reworked multi thread handling(by Andreas Degert)
reduced CPU usage for Oscilloscope
fix compile issues with multi core architecture (thanks Philipp for

(1) Add another to the "really cool things you can do with" jconvolver list.


A room-corrected Ambisonic listening rig made with free software

This paper (presented at the Tonmeistertagung 2008) describes the setup and
calibration of a room-corrected, Do-It-Yourself Ambisonic listening rig made
of affordable hardware components and free/open-source software.

The rig comprises a Linux Audio computer with the JACK realtime sound
server, the Ardour Digital Audio Workstation, AmbDec (a state-of-the-art
two-band Ambisonic decoder with near-field compensation), and the JConv
convolution engine.

The DRC room correction software is used to obtain filter kernels to
compensate for room and speaker deficiencies.
It is shown that a determined amateur can achieve very good results using
only free software and commodity hardware in a standard domestic
environment.Presentation slides are at

A video of an earlier presentation at LAC 2008 is available at
The slides that go with this video are at
A room-corrected Ambisonic listening rig made with free


>              Why Ambisonics?

Free software is only fun with free codecs, free

algorithms and free exchange of information.

 All major Ambisonic patents have now expired,

   and there is a huge academic and hobbyist

community of enthusiasts, plus a rich supply of

   freely available code and documentation.

     And: it sounds good and scales well.

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