Linux-audio-dev

linux-audio-dev@lists.linuxaudio.org

7513 discussions

by Dave Phillips

Greetings: Just a note to point out that there's a nice comment re: the LAD group in this report from Karlsruhe: http://www.osnews.com/story.php?news_id=4185 And a pic of Frank N. and Takashi looking pleased with things here: http://www.blachford.info/computer/LinuxTag2003/pics3.html Nice to see the coverage. Wish I could have been there... Best regards, == dp

22 years, 1 month

[linux-audio-dev] Csound-like LADSPA 'music compiler'?

by Hans Fugal

Is there a Csound-esque 'music compiler' that uses LADSPA plugins? It need not read Csound files, just have a similar approach: describe the music and sounds in text files. -- Hans Fugal | De gustibus non disputandum est. http://hans.fugal.net/ | Debian, vim, mutt, ruby, text, gpg http://gdmxml.fugal.net/ | WindowMaker, gaim, UTF-8, RISC, JS Bach --------------------------------------------------------------------- GnuPG Fingerprint: 6940 87C5 6610 567F 1E95 CB5E FC98 E8CD E0AA D460

22 years, 1 month

[linux-audio-dev] modern guitar preamps modelisation DSP techniques

by Fabien Costantini

Hi, I'm very interested into DSP modelisation techniques and more precisely about Guitar preamps modelisation techniques. Anyone have some resources, any SoA / Paper related to this subject ? As an example, I would like to understand what dsp underlying techniques use successful effects like : - the Amplitube VST software effect on mac/pc plateforms - For hardware effects, the Pod guitar effect from Line6 - and some others but not so many as good ... Thanks to Steve Harris from the audio-linux-dev mailing-list, I had a look to some interesting spice based modelisation of a fender 12ax7 preamp at http://quitte.de/dsp/ Does some of you have more knowledge about this ? TIA. Fabien Costantini.

22 years, 1 month

Re: [linux-audio-dev] [ANN] hdspmixer-1.0

by Thomas Charbonnel

> Anyone out there know of any companies/individuals I might recommend > for linux audio driver development for those vendors without the > experience to do this in-house? Thomas do you work with RME hardware > specifically? > > Shane > Maybe you should ask this to the alsa-devel list too. I think Paul Davis could be interested in doing this kind of job. I'm interested too. I worked on the hdsp driver and helper apps mainly because I owned a Multiface and wanted to use its full potential under my favourite and now only OS... Thomas

22 years, 1 month

[linux-audio-dev] modern guitar preamps modelisation DSP techniques

by Fabien Costantini

Hi, I very interested into DSP modelisation techniques and more precisely about Guitar preamps modelisation techniques. Anyone have some resources, any SoA / Paper related to this subject ? As an example, I would like to understand what dsp underlying techniques use successful effects like : - the Amplitube VST software effect on mac/pc plateforms - For hardware effects, the Pod guitar effect from Line6 TIA. Fabien Costantini.

22 years, 1 month

[linux-audio-dev] [ANN] hdspmixer-1.0

by Thomas Charbonnel

Hi, I'm pleased to announce the first public release of hdspmixer. Hdspmixer is a linux clone of Totalmix, a tool to control the advanced routing possibilities of the RME Hammerfall DSP cards. You can donwload hdspmixer here : http://www.undata.org/~thomas/ Thomas

22 years, 1 month

[linux-audio-dev] ANN: Csound Debian package

by Hans Fugal

Hello Debian users and interested bystanders, I have completed the Debian csound package. Once my sponsor has looked it over, approved of it, and uploaded it, it will be in unstable. In the meantime you can find it at deb http://hans.fugal.net/debian sid/main deb-src http://hans.fugal.net/debian sid/main I use csound, but I wouldn't consider myself a power user; in particular I haven't used any of the utilities (e.g. pvanal, hetro, etc.). If you do use them, please give the manpages a look-over and let me know if you see anything wrong. -- Hans Fugal | De gustibus non disputandum est. http://hans.fugal.net/ | Debian, vim, mutt, ruby, text, gpg http://gdmxml.fugal.net/ | WindowMaker, gaim, UTF-8, RISC, JS Bach --------------------------------------------------------------------- GnuPG Fingerprint: 6940 87C5 6610 567F 1E95 CB5E FC98 E8CD E0AA D460

22 years, 1 month

Re: [linux-audio-dev] Direct Stream Digital / Pulse Density Modulation musing/questions

by Mickael S Vardo

I'm a professional audio engineer for 15 years, and DSD did convince me. I could compare the sound quality with TI ADC/DAC. Conventional PCM techniques are unable to reproduce high frequencies correctly. And the explanation is very simple. If you record a sound at 44.1 kss, you get a theorical frequency response of 0 - 22050 Hz. BUT to describe frequencies from 11050 to 22050 Hz, you can only play with a 4-sample long period. A 22050 Hz sine could be really accurate (one sample up, one sample down every 1/22050th second), and so is 11025. But intermediary frequencies introduces temporal aliasing, some metallic feeling due to temporal quantization. This is inherent to the very low sampling rate (96 kHz is just a bit better, but no miracle), which is unable to describe waveforms at high frequencies. Bad high frequencies temporal definition means bad transients. Anyone can notice it when he _actually_ hear and compare PCM and DSD. Stop speculative talking and try to get some real demo... -- mickael

22 years, 1 month

[linux-audio-dev] Redirecting the isdncard's output to the speakers and redirecting the soundinput from the mic to the isdncard.

by Jorge

Dear Sirs, dear Madams I've programmed an utility called kisdnmonitor, it tracks the calls you make/ receive. It's for KDE as the name suggests. There's a server as well, it's called isdnserver. You can get more infos on both on: http://www.elogix.ch/linux_en.html Now I would like to add telephony support to the programs, so that you can use the computer as a "deluxe" isdn phone. So far I've figured out that you can dial through the modem emulation /dev/ttyIx. You just properly configure the device and then with the following Hayes codes: ATS18=1 ATS14=4 ATD<the phone number> you can start a call. Everything is ok so far, the problem is that, obviously, no sound will automagically come out from the speakers and nothing that is brabbled through the mic will go to the other side. Basically, what I want to do, is to stream the sound from the isdncard to the speakers and from the mic to the isdncard. Vbox (a voice call programm) is able to save samples from the isdncard's input. I should mention as well that years ago, I had a program that came with the isdncard (for windoze) called RVScom that had the same functionality, and it worked (in walkie talkie mode, I guess that my isdncard isn't full duplex capable). Since 8 bits suffice, the processor load shouldn't be extreme. Has anyone an idea? Any help would be greatly appreciated. Thank you in advance Respectfully submitted George

22 years, 1 month

[linux-audio-dev] calling all Terratec EWS88MT / envy24 control users

by Fons Adriaensen

Hello list, I hope there are some other users of the Terratec EWS88MT card out there, because I seem to be in serious trouble - the card 'works' but not in a way that makes it useful. I've got a test program that outputs the same signal (1 kHz sine at -6 dB below peak level) to all eight channels. Measuring the output levels, I get wildly different values. Using envy24control to set the DAC output levels only seems to make things worse - there is no logical relation at all between the slider position and the actual level. For each of the four pairs of channels, the two level settings interact in a more or less random way, mostly by just switching the other channel off or on. After a few minutes twiddling, all sound stops until I reboot. Similar things seem to happen with the inputs, but I haven't had the time to investigate those. So I'm wondering what's wrong - is my new card not up to standards, or is there a problem with envy24control trying to control it ? Any help / hints / tips appreciated ! -- FA

22 years, 1 month

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Linux-audio-dev