Linux-audio-user April 2004

linux-audio-user@lists.linuxaudio.org

141 participants
177 discussions

[linux-audio-user] Freestyle - FLOSS In Design - [Rotterdam, NL] A seminar on Free, Libre and Open Source Software in Design

by derek holzer

Hi LAUsers, although not explicitely audio-related, this seminar could be interesting for those involved in related creative fields such as design. I am also particularly interested in the comments about design and usability in Free/Libre/Open Source software which will be addressed here. I am sure everyone here can think of their favorite Linux sound app which could use a dose of design and usability to make it even better. d. ----------------------------------------------- Freestyle - FLOSS In Design A seminar on Free, Libre and Open Source Software in Design Time: 10.30-17.00 Date: Wednesday 19th May, 2004 Cost: 5euro, 2.50euro concessions Location: V2 Eendrachtstraat 10, Rotterdam Over the last few years ‘Free Libre and Open Source Software’ FLOSS, a form of collaborative software development has proven itself as a driving force of digital networks, especially the internet. Now this approach is beginning to open up new approaches in design and visual culture. This seminar will present clear information on this software and how it both challenges and provides new opportunities for media design. Art and design work using computers can often get stuck in the use of the same old tools. One thing that FLOSS does is to allow for new ideas to become software on a much faster timescale and with less reliance on conforming to a ‘mass’ market. Learning design increasingly means learning to use the applications of a smaller and smaller amount of companies. FLOSS offers one possibility for escaping such a trap. At the same time FLOSS itself could do with a good dose of design. Born as it is through the energy and imagination of software developers, FLOSS can in some cases fall behind in meeting the needs of users who aren’t also programmers. On the one hand this creates an important demand for greater technical literacy amongst users, but it also means that interfaces to, for instance, cultural practices, need creating. The morning session will present an introduction to FLOSS software in design. The emphasis is on a realistic survey of the possibilities this way of working is opening up. The afternoon will present a number of case studies. Artists and designers using FLOSS software will show and talk about the tools they work with, the culture of use of the software. Software developers will present their projects and open them up to questions and debate. Confirmed speakers: Kit Blake – Silva, content management system, Rotterdam; http://www.infrae.com Erik Dooper - Open Source Software Lab, Amsterdam, will demo Scribus, SodiPodi and Inkscape. http://www.ossl.org/ Rishab Aiyer Ghosh - Economist and editor of FirstMonday, Maastricht; http://orbiten.org/rishab.html Graham Harwood - artist, London, speaking about The GIMP http://www.scotoma.org/ Jaromil - GNU/Linux developer, South Italy, currently resident at Montevideo, Amsterdam; Dynebolic, http://www.dyne.org/ Roger Teeuwen – Graphic Designer, Rotterdam Other speakers are to be confirmed. This seminar is jointly held by: Media Design Research, Piet Zwart Institute, the institute for postgraduate studies and research of the Willem de Kooning Academy Hogeschool Rotterdam http://pzwart.wdka.hro.nl/ Interactive Media, Hogeschool van Amsterdam V2_Organisation, Institute for the Unstable Media http://www.v2.nl/ -- derek holzer ::: http://www.umatic.nl ---Oblique Strategy # 38: "Courage!"

21 years, 1 month

[linux-audio-user] digidesign mbox

by juto aviten

Hi, do you know if the usb sound card mbox from digidesign could be used under linux or it's all proprietary and only link to protool$. I know someone who want to switch to linux but she bought this card, I didn't find anything on alsa project and not really on internet... thanks for your help juto

21 years, 1 month

[linux-audio-user] DAW controllers for audio

by Sampo Savolainen

Does anyone have experience controlling Ardour with an physical daw controller? I'm looking into either midi or usb devices. Optimal would be a small USB controller, with maybe 4 configurable sliders, a wheel and transport control. I would prefer not paying for audio features, but it would be nice if the controller would double as a midi interface. I also heard about (cheap?) mixers which output midi and could act as controllers. Sampo

21 years, 1 month

[linux-audio-user] Non-xrun noise with ALSA, Jack and an USB soundcard

by Jorma R

Hi, I wonder if this is normal... I get a lot of noise - clicks and pops - when connecting Jack ports. The noise appears when I run Jack in duplex mode and with a period size less than 2048 frames. I get no noise if I run Jack with playback only. If I for example run Hydrogen and connect its ouput ports to alsa_pcm playback ports I get noise when in duplex mode but no noise when in playback only. The strange thing is that I get no xruns when the noise appears. I do not run out of CPU power either - the CPU usage is down to about 10% when running Jack and one client for example. What I want to do is to record 24-bit audio with my Emagic Emi 6|2m USB audio box. I can do this at the moment - the captured audio is clean and I can use the hardware monitoring to monitor what is being captured. Naturally I would like to get rid of the noise as well to take full advantage of what the box should be capable of. I could simply run Jack with 24-bit capture and with a period size of 2048 or more but Jack refuses to start with such settings. Should I just accept the situation as a fact or is there something I could do to get rid of the noise when running Jack in duplex mode and with 24-bit samples? The Kernel I am using is a 2.4.25, Alsa is 1.0.3 and Jack is 0.94 all from from PlanetCCRMA. The hardware should be irrelevant - the same problem appears in 3 different computers I have tried ranging from a Celeron 700 to a P4 2.4 Ghz. Ideas, anyone? Br, -Jorma __ Sano ei kuukausimaksuille. Hanki Suomen ainoa aidosti kuukausimaksuton GSM-liittymä osoitteesta http://www.saunalahti.fi

21 years, 1 month

[linux-audio-user] Midiman keystation help

by mike＠banta.psyc.missouri.edu

Hello everyone, I'm trying to install the firmware loader for my midiman usb keystation but recieve the following: make install ./extractfirmware processing UKS11LDR.SYS ... invalid PE header offset make: *** [install] Error 1 I've seen a thread for this on this list, but the problem was answered by someone sending a UKS11LDR.SYS file that actually worked ( ; I'm using the file off the driver CD, as the suggested download won't execute on my win XP system. Any insite is very much appreciated, mike --

21 years, 1 month

Re: [linux-audio-user] anti-compressing?

by Martin McCormick

What you are describing is the process of companding as in COM-pressing and EX-panding. It is certainly possible and is done in lots of applications such as Dol bey sound systems of various types and in communications systems. It is a neat way of faking out the ear in to thinking there is less noise on the system than there really is, assuming one doesn't have too much noise. In order to properly expand the sound, however, one has to know the characteristics of the level compressor such as the attack and release times. What you are doing is a mirror image of what the compressor did. If you know that information, then you should be able to restore dynamic range to the original recording. Sometimes, this technique backfires and you can get some effects that are worse than nothing at all. If the input level to the expander is wrong, it will not track the compression and may cause a booming effect to speech or music that wasn't originally there. If there is a lot of noise on the channel that wasn't on the input signal, the noise will appear to puff or pump along with the audio. If one gets the level compression ratio and or the attack and release times wrong, there is a whole boatload of weird effects that can happen. Your mileage will definitely vary. Martin McCormick WB5AGZ Stillwater, OK OSU Information Technology Division Network Operations Group Andrew Gaydenko writes: >Few days ago there was discussion in the list about mastering-CD/compressing/ >limiting/gain-upping and so on. I have strange feeling from the discussion.

21 years, 1 month

Re: [linux-audio-user] New Kernel; No Sound. Linux-2.6.5 ALSA

by Martin McCormick

Mark Knecht writes: >I believe that all of these still exist, but you may just have out of >date versions. There are a number of packages to Alsa now: > >alsa-drivers >alsa-oss >alsa-lib >alsa-tools (you probably need this) Got them. All x-based. >alsa-utils (you probably need this too) Got them and not totally sure what they do yet.:-) >alsa-jack >alsa-firmware > >Good luck, Thank you. The hardware is working, I think. I now have audio that is fed in to the line in jack being passed through to the output. I found an ancient program called setmixer going back to 1994 in the Debian treasure trove of packages that one can download. Interestingly enough, that ancient program along with aumix both do one and only one thing to the sound card. By telling either mixer to adjust the line volume, the pass-through or monitor level adjusts perfectly in that setting line to 100 is quite loud while setting it close to 0 is almost all the way down. Both aumix and setmixer return sensable values for all the other controls such as mic and PCM levels, but no other control has any effect at all. If I cat /dev/dsp in to a file, I see the familiar pattern of silence which is mostly 0x80 with the occasional 0x7f. I did download a new version of alsaplayer and it probably will work if I ever get audio out of the card. .wav files seem to silently play for the right amount of time. On the alsa site, I found several mixers and every darn one of them requires a GUI. Unless there is one of them that will work from the command line as well as from X, I haven't found anything that I can use. The other possibility is to find some documentation describing the ioctl interface to /dev/mixer and start banging out a C program that talks to the correct registers, sort of a modern version of setmixer that works. As one who has experimented with assembly language on several processors, this has all the earmarks of a mapping problem. There is probably a bit in some register that needs to be on or off, but the old mixer control program is talking to the wrong register or the bit is not even something this program knows about and it doesn't get set. For now, it's back to 2.4.19 if I want to hear any digital audio. I really do appreciate all the help so far. This is nobody's fault or anything like that. It is a case of rather complex technology that is trying to work over a very wide range of hardware. It's a miracle it works at all when you think of what all is happening. On this computer, there is still one burned out bulb in the string so to speak. Martin

21 years, 1 month

Re: [linux-audio-user] New Kernel; No Sound. Linux-2.6.5 ALSA

by Martin McCormick

My thanks to a list member who wrote me off the list and told me about the aabuild and aadebug scripts on the alsa site. I ran the aadebug script and found that the biggest problem seems to be that ALSA couldn't find my sound card after plug and play registered it. Putting in the sound card driver as a built-in to the kernel rather than a module seems to have cured that problem and I may actually have it working. Now, for the next part: Since ALSA is part of the kernel, I need some command-line tools to take the place of aplayer and amixer which were in the old distribution. As a computer user who is blind, I do not use X windows because there isn't a truly working interface to X that makes it talk to us yet. It is in the works, but it has been there for about a decade although it really is getting a lot closer. I presently have aumix on the system and it did adjust some of the controls on the sound card under the 2.4.19 kernel and the OSS modules, but I gather that it doesn't talk to /dev/mixer, etc. The old ALSA utilities I had on here had Amixer and aplayer and dated back to December of 2001. They don't even try to work with the present setup. So, my question for now is, are there any command-line-based applications that replace aplayer, amixer and something I saw called alsamixer? This is all a bit confusing since there is a lot of software that is based on the old ALSA which doesn't seem to do anything at all in the new setup. Thanks to all. Martin McCormick

21 years, 1 month

[linux-audio-user] isolate the bass line

by millward

Could someone advise me on what software to use to isolate the bass line in a .wav file? I'm running Linux Red Hat 9.0 but I have a friend with an XP machine, so anything that works on either would be OK. That is, if it's not too expensive.

21 years, 1 month

[linux-audio-user] M-Audio Quattro and 2.6

by metafor＠gmx.net

Hi Is there any posibility to get this card working with 2.6 kernel? If not, is there some resource on the net to get it working under 2.4.xx with jack and pd, because as far i was not able to get it running without a lot of noisy clicks. any ideas? thanks marc

21 years, 1 month

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Linux-audio-user April 2004