Linux-audio-dev

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7520 discussions

[linux-audio-dev] Re: [linux-audio-user] Re: M$/SuSE/ALSA ?

by Rui Nuno Capela

Rob wrote: > On Friday 10 November 2006 11:11, Rui Nuno Capela wrote: >> and will do pass the message. But, ...be warned. At the >> slightest hint that ALSA and KDE is getting behind the >> community idea, I will step ahead (i.e flee :) > > While SuSE may have contributed to KDE, Novell actually owns > Ximian, which for all intents and purposes created GNOME. I've > always been wary of the movement to incorporate Mono into GNOME, > and now I'm much, much more so. > you should have read between the lines that I'm not very found of gnome and all that. my reasoning is simple: miguel started it just because someone told KDE was evil because Qt wasn't pure GPL at the time; then a whole wasteful effort begun to make gnome as the official gnu/fsf desktop; then come ximian; then miguel found that not.net was some kind of bethelem star. go figure why people didn't stuck with (imho) higher brained C++ and KDE just for the doctrine, go figure. :)) (what a waste of great minds) ... and what we have now? Yes, we do still have JACK and Ardour, ALSA, KDE and Linux as true high-tech, open-source, top-of-the-notch projects in the whole known universe. Go catch it, corporate-BS-savvy-boys :))) > I don't see any particular threat to Linux audio users that isn't > also present for Linux users in general, though. > Nor do I. After all, we the guys/gals are few and numbered, but do it for the fun and love, not for the money. Bah, did I say "love" ? Ah, for you who that don't know me, I was a hardcore windows developer once before. Ah, read "once" with emphasis :) thing of the first-half-nineties, blerk! Bottom line is, and that's not an opinion, the F/OSS (r)evolution is already unstoppable. Evidence comes to that IBM knows it. Ultimately, MS knows it too. And you just got to face it now? If you stay with me, and I believe MS strategy cannot be far behind, the OS business is already a dead-end. People are in charge. If you speak BS-like, you can read: the customer is in charge. And don't reply that was RH who come original with that slogan. I do remember something of the sort from Hammer's "reengineering the corporation". Yes early nineties gone old :) Just for the topic, funny thing is, a copy of gamma's/GOF is still around here somewhere and being a mid-nineties foundation truth must be told,... I'm just an old donkey who doesn't learn new languages anymore :D Cheers. -- rncbc aka Rui Nuno Capela rncbc(a)rncbc.org

19 years, 1 month

Re: [linux-audio-dev]Multiplexing 4 channels on SPDIF

by mikko.helin＠luukku.com

Just wondering how the framing is specified in that protocol, does it use some lsb's just like the VST System Link protocol does? It would be also nice if you documented the protocol and made it PD so the support could be added also to ASIO4ALL drivers etc. (http://www.asio4all.com/). Btw. In theory you could support 8 x 24-bit (less the framing bit) / 48kHz audio transfer over the SPDIF if you used the 192 kHz sampling rate! Not bad, where do we need the ADAT protocol actually? - Mikko ................................................................... Luukku Plus paketilla pääset eroon tila- ja turvallisuusongelmista. Hanki Luukku Plus ja helpotat elämääsi. http://www.mtv3.fi/luukku

19 years, 1 month

[linux-audio-dev] [ANN] kbdz 0.2.0a

by Elthariel

I'm happy to announce the release of kbdz 0.2.0 alpha, a set of tool which allows you to transform classical pc keyboards and mouses plugged via USB into midi keyboards and controller. Support for joysticks is planned for soon. It uses alsa sequencer and the 'new' event devices stack (evdev module). You can find it here: http://sourceforge.net/projects/nahlwe/ Please give me feedback if you test it. Regards, Elthariel.

19 years, 1 month

[linux-audio-dev] Re: alsa, oss , efficiency?

by Kjetil S. Matheussen

lemmel: > > Hi everyone. > > for a project, we need to be able to play sound (at first look wav file), and > we made several tests ; with a created stereo sound, we try to use alsa but > the results doesn't fullfill our needs : > > sound played at the time, T, we want, and finished at the date, D=T+sound > duration. > (thi is a software with strict time constraints) > > The sound was always troncated (even with finished software such as xmms, > amarok), and even randomly truncated, (sound created with audacity, and > exported as WAV 16/32 bit etc). > > When we use OSS, all seems to be perfect. > > But, it seems that OSS is nowadays "deprecated", and consequently we shouldn't > use OSS. What we can do ? Are our alsa results due to misconfigurations ? > Only the oss modules in the linux kernel are deprecated. Programs using the OSS api will still continue to work, currently most importantly because of the oss emulation module in alsa. If you should choose between alsa and oss, and the oss version works just as well, or better than the alsa version, choose oss, because its a more portable API than alsa. However, if I were you, I would use sndlib, portaudio, jack, or some other higher level audio input/output library instead of oss or alsa.

19 years, 1 month

Re: [linux-audio-dev] [ANN] kbdz 0.2.0a

by CTAF ctaf

I have tried it, it work nice for me. nice jobs. I am waiting for the joystick support, to use it with mixxx :-)

19 years, 1 month

[linux-audio-dev] [ANN] Snd-ls V0.9.7.12 and jack_capture V0.3.9

by Kjetil S. Matheussen

Snd-ls v0.9.7.7 =============== Snd-ls is a distribution of Bill Schottstaedt's sound editor SND. Its target is people that don't know scheme very well, and don't want to spend too much time configuring Snd. It can also serve as a quick introduction to Snd and how it can be set up. Changes 0.9.7.7 -> 0.9.7.12: ---------------------------- -Fixed listener. -Removed various debug printing. -added --without-builtin-gtkrc configuration option. -Downgraded Snd from 8.4/26.9 back to 8.4/12.9 again. That upgrade was a mindless mistake. -Copied all files from my private snd three into snd-ls. Hopefully, this should make everything work again. -Added fix to make jackdmp work with standard installation of guile. -Don't quit snd-ls in case file can't be opened during startup. Bug reported by Dragan Noveski. -Disable FAM for now, because it fails for no reason during startup. Problem reported by Dragan Noveski. Download from http://www.notam02.no/arkiv/src/snd/ jack_capture v0.3.9 =================== jack_capture is a program for recording soundfiles with jack. Its default operation is to capture whatever sound is going out to your speakers into a file. This is the program I always wanted to have for jack, but no one made. So here it is. Changes 0.3.8 -> 0.3.9: ----------------------- *Changed the -rt option name to -d, to be compatible with jackrec. *Do not stop recording in case of disk errors. *Replaced deprecated libsndfile functions. *Added the --format/-f option. ("jack_capture -f flac", nice :-) ) (adding "-f w64" solves the 4GB limitation of wav files)

19 years, 1 month

[linux-audio-dev] Anyone else ever run a THD test on Jamin?

by Dan Mills

Hi all, While hacking around with aliasing effects in digital compressors (Yes it is real, yes you can hear it!), I happened to run a 10Khz sine wave into jamin with an instance of Jaaa hooked up to the output. The results were 'interesting' as it appears that jamin introduces easily measurable harmonic distortion even with all compressors and eq bypassed! Switching the master bypass in jamin however does make the effect go away. This was at a level of -26dbFS with no boost and with the limiter bypassed. I say 'harmonic distortion', but it really is not quite that as it appears as a series of narrow spikes every few hundred Hz. Further checks show that the same effect appears with the test tone turned down to 2.5Khz and that eq bypass has no effect. Now with a single tone we are looking at per 'harmonic' energy almost a hundred db down on the test tone, but there are a lot of these spikes and they increase in number as additional inputs are added, so there might be quite a lot of energy here all told. Anyone have any ideas? This thing should be linear under these conditions! Regards, Dan. Send instant messages to your online friends http://uk.messenger.yahoo.com

19 years, 1 month

[linux-audio-dev] alsa, oss , efficiency?

by lemmel

Thanks for all of your mails, I collected a lot of information :-) Bye !

19 years, 1 month

[linux-audio-dev] Multiplexing 4 channels on SPDIF

by Fons Adriaensen

Hello all, Core Sound <http://www.core-sound.com/default.php> willsoon be offering a tetrahedral (Ambisonic) microphone at a very reasonable price. They are also working on a combined preamp + AD converter unit for this mic. This will be able to multiplex the 4 channels over a single SPDIF link, by using it a the double sample frequency. I'm currently working on a software controller unit for this microphone. It will perform A-format to B-format conversion, and allow measured impulse responses to be used for calibrating the four mics. The result should be a very high quality portable surround recording system at a reasonable price (compared to other solutions which cost easily five times as much). The remaining problem is the demultiplexing of the two double speed SPDIF channels to four channels. It could either be done within the ALSA layer, or in JACK's ALSA backend. Doing this in a JACK client will not work unless it would be the only client - all others would get the wrong idea of the sample frequency and buffer size. So here's my question to both the ALSA and JACK teams: what would be your idea of a solution for this ? -- FA Lascia la spina, cogli la rosa.

19 years, 1 month

[linux-audio-dev] [ANN] Faust Online

by Orlarey Yann

Dear All, A completely rewritten Faust website is available at http://faudiostream.sourceforge.net or at http://faust.grame.fr . Its main feature is the possibility to use the Faust compiler online, via the web pages, without having to install it on your machine. The website contains a small catalog of softwares written in Faust. Each software is available to download in various binary formats (Linux/i386) : * standalone applications : alsa-gtk, jack-gtk, oss-gtk, libsndfile command line * plugins : ladspa, puredata, Q, supercollider The SVG block-diagrams of each software are also available ('->svg' link). These block-diagrams were generated by the Faust compiler using the -svg option. You can navigate down the hierarchy of block diagrams by clicking on the blue boxes. A click on the white background allows to move up. Another link, the '->code' link, allows to view and edit the Faust code of the application. It is useful to learn how a specific application is written in Faust. But the funny part is to modify the Faust code to your needs. You can then recompile it and look at the generated C++ code or at the corresponding SVG block-diagrams. Once your Faust program successfully compile, you can choose the appropriate architecture and download a 'source' tar.gz file that contains the C++ code and a Makefile, or directly a binary file for Linux/i386. Please note that for puredata, the binary file is a tar.gz archive that packs together the plugin and a user interface patch, thanks to Albert Graef 'faust2pd' patch generator. For supercollider it is also a tar.gz archive that packs together the plugin and a class description, thanks to Stefan Kersten 'faust2sc' class generator. Please note also that the website is still experimental and probably not very robust. To navigate the website use the navigation buttons on the left, the back and forward buttons will not work very well. Yann

19 years, 1 month

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Linux-audio-dev