Linux-audio-dev November 2003

linux-audio-dev@lists.linuxaudio.org

84 participants
92 discussions

by Alexander Franca Fernandes

Hi! Please, be patience with my horrible english. I want make one program that can get notes/sounds and put out in screen images. I don't have any idea how I can do this. What language, what libraries, and I don't have any Idea how work /dev/dsp. What the first step? This project is for pupils of school where I work. We want do one project where pupils can do more with computer. Actualy in majority of schools the work in computer just resume using this machine for make "office" jobs. The comunication, expression, human knowledge, is "puted" out. So... we want try destroy some concepts using computer with people between 12 and 16 yeas old. This program we want build is just one part of our project. So... if I can do this program, need I learn a lot of mathematic and fisic? Or I can do this just with knowlegde about programer. Thanks for any help! Alexander

21 years, 1 month

[linux-audio-dev] Linux on TI DSP boards

by Vincent Touquet

http://www.linuxdevices.com/news/NS3468265897.html Looks cool. A little proprietary, but it seems to have an SDK. vini

21 years, 1 month

[linux-audio-dev] swh-plugins for jackEQ?

by Jack O'Quin

I'm trying to run jackEQ. If I use the current release of swh-plugins, it fails because dj_eq_1901 is missing. If I use the latest snapshot I can find on Steve's web site, swh-plugins-2003-10-21.tar.gz, this plugin exists. But using that, jackEQ and JAMin both segfault on startup. GDB shows a segfault in lookahead_limiter_1435.xml, line 110. So, what version of swh-plugins works for jackEQ? -- Jack O'Quin Austin, Texas

21 years, 1 month

[linux-audio-dev] StreamIt - "compiler for modern streaming systems"

by Roger Larsson

(resent, previously sent from non member account) Found this on comp.arch "StreamIt is a programming language and a compilation infrastructure, specifically engineered for modern streaming systems. It is designed to facilitate the programming of large streaming applications, as well as their efficient and effective mapping to a wide variety of target architectures, including commercial-off-the-shelf uniprocessors, multi-clustered architectures, and the emerging class of grid-processors." http://cag.csail.mit.edu/streamit/ It does handle feedback loops among other things. /RogerL -- Roger Larsson Skellefteå Sweden

21 years, 1 month

[linux-audio-dev] Re: aRts development (KDE)

by Roger Larsson

(resent, previously sent from non member account) On Tuesday 04 November 2003 20.13, Sean Meiners wrote: > Thanks, that helped. But it only seems to run if I stop the aRts server, > which seems to defete the purpose of having it. > > On another note, has anyone had any luck/experience with recording? I need > to be able to access and pull data from the microphone. Also, what about > controling the sample rate? I only want 8000Hz from the mic, anything more > is overkill for my needs. It is not trivial... :-( (but it is much better now KDE3.2b, then the last time I tried) First thing first (I forgot when testing...) * Control Center -> Sound System -> Hardware Tab -> Full Duplex !!! If you use KDE then read the KRec startup tips carefully. * Tools -> Audio Manager, click on KRec::In to select arts bus to record (in_soundcard) start Arts control tool (optional), on View there are some interesting tools with older KDE you access the Audio Manager from here. start KMix, to select what hardware source is routed to in_soundcard. Input: select source (Mic, I guess for 8kHz) and capture, adjust levels (I had to actually move the sliders - bug...), deselect others. Recording levels should move with your mic input... * File -> New (~ insert the tape) * And finally it should be possible to press the red record button. rewind the tape playback /RogerL > > On Monday 03 November 2003 08:55 pm, Jonas Christian Drewsen wrote: > > On Monday 03 November 2003 21:47, Sean Meiners wrote: > > > I've been pulling my hair out for the last week or so trying to find a > > > good, > > > > clean, and simple tutorial/example/manual on how to begin > > > > > developing an app that uses aRts. So far I haven't found anything > > > besides the idl and class documents, but those are really only usefull > > > once you get going. Is there anyone out there who's found/seen/wrote a > > > simple tutorial along the lines of this: > > > "http://doc.trolltech.com/3.2/how-to-learn-qt.html"? Or maybe just a > > > very simple little app that plays a .wav file from the command line? > > > Any help would be appreciated, even RTFM if it includes a link since I > > > haven't > > > > found a FM for developers yet (no, the KDE help docbook didn't > > > > > help). > > > --Sean Meiners > > > > I think this should work. An example of playing stuff using playobjects > > and one of how to play a simple sinusoid is attached. You may have to > > edit the Makefile. > > > > > > *** eSafe scanned this email for malicious content *** > > *** IMPORTANT: Do not open attachments from unrecognized senders *** -- Roger Larsson Skellefteå Sweden

21 years, 1 month

[linux-audio-dev] [ANN] GNUsound 0.6.1 released

by Pascal Haakmat

Hi, GNUsound 0.6.1 was released. This is a maintenance release to fix a few critical bugs. I really wanted to skip this release and go straight for 0.7, but there's too much work to be done on that version still, and the 0.6 bugs are quite serious. Changes from version 0.6: Fixed bug where channels past 4 wouldn't play (by removing unrolled mixer_mux()'s, they hardly added any speed anyway). Fixed possible crash drawing markers (Jens Mauer). Fixed crash canceling "File Save" dialog. Fixed crash on machines with MMX but without MMX2 (original Pentium). Download at the usual place: http://awacs.dhs.org/software/gnusound Thanks, Pascal.

21 years, 1 month

[linux-audio-dev] Microsoft gets a patent on partitioned convolution

by Anders Torger

This might be interesting to some of you: The newly granted patent US6625629 "System and method for signal processing using an improved convolution technique" owned by Microsoft, covers partitioned convolution. The patent was filed in May 2000, and granted in September 2003. This is in most claims the same convolution algorithm previously patented by Lake Technology with priority date back in July 7 1992, US5502747. And that is in most claims the same algorithm as invented and published by Soo and Pang and others prior to 1992, which is the same algorithm used in my software BruteFIR. Isn't the patent system wonderful? The requirements "new" and "non-obvious" were in practice scrapped a long time ago... Anyway, Microsoft does as far as I know not have the tradition to harass free software developers as Lake has, so I don't think the fact that another one owns the partitioned convolution algorithm will cause any more trouble. It would be interesting to know what Lake thinks about this. If Microsoft has patented it, they probably use it, and then Lake might want them to pay royalty, or else.... /Anders Torger

21 years, 1 month

[linux-audio-dev] [ann] guitar preamp plugin, v2

by Tim Goetze

hi all, a new, completely redone version of my valve-inspired preamp plugin is up. improvements over the predecessor include: * smoother distortion; clipping kicks in veeery gently * a better 'gain' knob model and balance between input and output loudness * initial hi-pass filtering now part of the unit * gentle mid-range frequency boost * closer matching of the original circuit's harmonic distortion characteristics * 4x oversampling at 44-48 kHz sample rates more info and the plugin sources at http://quitte.de/dsp/preamp.html enjoy, tim

21 years, 1 month

[linux-audio-dev] Does NI run Traktor FS on Linux through Wine ?

by Benno Senoner

From here: http://www.native-instruments.com/index.php?fsfeatures_us "In TRAKTOR FS the Final Scratch System has a high-performance DJ software that has been specifically optimized for the needs of Final Scratch users. System Requirements: *Runs on standard PCs, operating on Linux OS (all necessary software included)" from here: http://jane.no-ip.com/traktor-debian.html "This is work in progress but posted for people who wish to get Native Instruments / Standon Magnetics Final Scratch version of Traktor to work on their own linux distribution rather than the stripped installation that they provide on the CD. Please note this may not work for you at all - and I've tried to be as direct as I can with the documentation - It's assumed that you've played in a shell before, and have some familiarity with linux.. " I'm not a FS user but from reading the page it seems that they are using Wine to run it under linux from a self bootable CD. Anyone got more infos about this ? (I'd interested if Wine is performant enough etc ....) from here: http://djzorro.mynet.it/ "Dear Visitor, these "patches" (try to) add (a sort of) networking ability to a GNU/Linux distribution made by Nativ e Instruments as a OS for their Traktor Final Scratch software. " For curiousity I downloaded one of the ZIP files. It unzips to a .tuc and .tup file. The tup file is a tar.bz2 file so just rename and untar it. For example in the boot dir you see two kernels: 2.4.22pre1-ni 2.4.22pre1-z Are these standard kernels, did they use patches or did they write their own ? (where are the sources ? are they objeing the GPL license ?) Comments ? Benno http://www.linuxsampler.org

21 years, 1 month

[linux-audio-dev] [ANN] libgig - Gigasampler file loader library

by Christian Schoenebeck

Thanks to the great reverse engineering work of Paul Kellett and Ruben van Royen I created this library. libgig is a C++ cross-platform loader library for Gigasampler files. The library consists of three parts: - RIFF classes for parsing arbitrary RIFF files - DLS classes which use the RIFF classes to parse and provide access to DLS level 1 and 2 files - gig classes which are based on the DLS classes and provide the necessary extensions for the Gigasampler file format So you can also use the library for loading DLS files or RIFF files in general, but the main focus is the Giga format, which you might get from the name of this lib ;) You can get the sources coming with tools / demo apps, API documentation, UML diagram and a short kick start docu at: http://stud.fh-heilbronn.de/~cschoene/projects/libgig/ I claim that this library provides all articulation data the Gig format contains. If you think I might miss some, let me know! The library should be compilable on all platforms. Nevertheless I don't own a non Intel system, so I can't test it; maybe it needs some minor adjustments but I took care about endian and word size correctness when I wrote the lib, so I'm quite confident it will work! Let me if you tried it on a non Intel system! Best regards Christian Schoenebeck

21 years, 1 month

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Linux-audio-dev November 2003