Linux-audio-dev August 2010

linux-audio-dev@lists.linuxaudio.org

42 participants
40 discussions

by hermann

Am Samstag, den 28.08.2010, 14:21 -0400 schrieb Camilo Polymeris: > Hi > Sorry. According to that, it seems it's not an EMU 1010 based card. > Probably a completely different beast. > > These are the card this app is intended for: > http://www.emu.com/products/welcome.asp?category=505& > > Is yours one of those? > If so, which version of the alsa drivers are you running? > > Greetings, > Camilo Ah okay, my is this one here : http://en.wikipedia.org/wiki/Sound_Blaster_Live! Sound Blaster Live! Platinum, it's EMU10K1 based. EDIT:// alsa driver is snd-emu10k1 with kernel 2.6.33.6-rt26 #1 SMP PREEMPT RT Tue Jul 27 06:22:24 CEST 2010 i686 GNU/Linux greats hermann

14 years, 10 months

Mixer GUI for EMU 10k cards

by Camilo Polymeris

Hello all, A long ago, I said on this list (I think), I had the intention to write a graphical mixer/router for the EMU 10k cards (EMU 1212m & EMU 1616m). I wanted to make a nice, well-written, full-featured app with routing levels and eventually effects and all, but couldn't figure out all the intricacies of the card's driver. So, over the last two nights I hacked together a simple "Matrix"-style app, very ugly in code, but functional, for me, at least. I won't have time to maintain it, but if you want to try it out, at the end of this message you'll find links to a screenshot, the source package and an x86_64 build. You'll need Qt & ALSA libraries, of course. Be aware that many features are missing, but basic routing works. I'll put up a version control repo when I have time. Any comments welcome. Greetings, Camilo Links. Everything licensed under GPLv3: http://www2.udec.cl/~cpolymeris/emutrix/Screenshot-EMutrix-1.png http://www2.udec.cl/~cpolymeris/emutrix/emutrix-0.1.tar.bz2 http://www2.udec.cl/~cpolymeris/emutrix/emutrix

14 years, 10 months

Whitespaces in jack client/port names / jack_connect

by Philipp

Hi, I have issues with jack client names that contain whitespaces. Example: $ jack_connect MPlayer [19079]:out_0 system:playback_2 ERROR [19079]:out_0 not a valid port Any idea how I can make this work? I tried: $ jack_connect "MPlayer [19079]:out_0" "system:playback_2" ERROR MPlayer [19079]:out_0 not a valid port $ jack_connect 'MPlayer [19079]:out_0' 'system:playback_2' ERROR MPlayer [19079]:out_0 not a valid port So I wonder whether spaces in jack client names and ports are even allowed, since imho jack_connect is a rather fundamental tool, and either the tool or those clients are broken. -- Philipp -- "Wir stehen selbst enttäuscht und sehn betroffen / Den Vorhang zu und alle Fragen offen." Bertolt Brecht, Der gute Mensch von Sezuan

14 years, 10 months

Re: [LAD] [LAU] mudita24 1.02 -- improved envy24control mixer/router for ice1712-based sound-cards

by Niels Mayer

On Sun, Aug 8, 2010 at 7:59 AM, Geoff King <gsking1(a)gmail.com> wrote: > I tried the source version of your 1.0.2 mudita release. I'm having > problem with the build step. This is with FC13. Any thoughts? >... > -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgio-2.0 -lpangoft2-1.0 > -lgdk_pixbuf-2.0 -lpangocairo-1.0 -lcairo -lpango-1.0 -lfreetype > -lfontconfig -lgobject-2.0 -lgmodule-2.0 -lgthread-2.0 -lrt -lglib-2.0 > -lasound > /usr/bin/ld: levelmeters.o: undefined reference to symbol 'log10@@GLIBC_2.0' > /usr/bin/ld: note: 'log10@@GLIBC_2.0' is defined in DSO /lib/libm.so.6 Geoff -- thanks for reporting this issue. It is a configuration mistake in this release which doesn't show up in F12, which is what I'm still using. Apparently, Fedora13 wants it to link with "-lm", but F12 links happily without "-lm" ...So I never saw this misconfiguration when I tested my distro build on F12... As a quick fix, you should be able to link successfully by adding "-lm" to the end of the linking command: gcc -I/usr/include/gtk-2.0 -I/usr/lib64/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -I/usr/include/alsa -g -O2 -o envy24control envy24control.o levelmeters.o midi.o mixer.o patchbay.o hardware.o driverevents.o volume.o profiles.o config.o -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgio-2.0 -lpangoft2-1.0 -lgdk_pixbuf-2.0 -lpangocairo-1.0 -lcairo -lpango-1.0 -lfreetype -lfontconfig -lgobject-2.0 -lgmodule-2.0 -lglib-2.0 -lasound -lm The correct approach is to add "-lm" to the configuration files (i thought i had, but mistakenly modified the generated file rather than the configuration input files -- and "make dist-gzip" didn't of course include my modification) ... I will need to fix this build-blunder in the next release. Sorry. If anybody has a suggestion on the most portable/reliable way of doing this, please let me know. I believe adding a line to configure.in-gtk2 like ENVY24CONTROL_LIBS="$LIBS $ALSA_LIBS $GTK_LIBS -lm" would do the trick, but you never know what happens to a simple line of script out in the wild :-). Is the above an accepted&proper way of adding "-lm" to an autoconf file? -- Niels http://nielsmayer.com

14 years, 10 months

guitarix-0.11.1 Bug fix release

by hermann

On behalf of the guitarix team I'm proud to announce Guitarix Version 0.11.1 Bug fix release Guitarix is a simple Linux Rock Guitar amplifier and is designed to achieve nice thrash/metal/rock/blues guitar sounds. Guitarix uses the Jack Audio Connection Kit as its audio backend and brings to the jack audio graph a mono amplifier input/output port, and a FX mono input with two (stereo) output ports. Guitarix provides a jack midi input port to connect a midi controller (midi learn) and a (3 channel) jack midi output port, feed by a (scalable) mix of the tuner and a beat-detector. Release 0.11.1 comes with following changes : * fix Bug Echo/Chorus/Delay/Slooper don't work * add pre/post processing switch to all mono Effects We put the Guitarix widgets into a library, with the goal of making them usable independently from Guitarix. You can build it as shared library and there's a c++ (gtkmm) wrapper, a python wrapper and glade support. Check it out and look for examples in those directories, or just build a nice looking display with the glade editor, and of course ask in our Guitarix forum (it's still alpha). As a side note, Guitarix is now in debian(sid/squeeze/Experimental) , have fun _________________________________________________________________________ guitarix is licensed under the GPL. Project page with screenshots: http://guitarix.sourceforge.net/ download: http://sourceforge.net/projects/guitarix/ please report bugs and suggestions in our forum here: http://sourceforge.net/apps/phpbb/guitarix/ ________________________________________________________________________ For capture, guitarix uses the great 'jack_capture' (version >= 0.9.30) written by Kjetil S. Matheussen. If you don't have it installed, you can look here: http://old.notam02.no/arkiv/src/?M=D For extra Impulse Responses, guitarix uses the zita-convolver library, and, for up/down sampling we use zita-resampler, both written by Fons Adriaensen. If you don't have it installed, get it here: http://www.kokkinizita.net/linuxaudio/index.html We use the marvellous faust compiler to build the amp and effects and will say thanks to : Julius Smith http://ccrma.stanford.edu/realsimple/faust/ : Albert Graef http://q-lang.sourceforge.net/examples.html#Faust : Yann Orlary http://faust.grame.fr/ ________________________________________________________________________ For faust users : All used Faust dsp files are included in /guitarix/src/faust, the resulting cc files are in /guitarix/src/faust-generated The tools we use to convert (post-processing and plot) the resulting faust cpp files to the needed include format, stay in the /guitarix/tools directory. ________________________________________________________________________ regards Hermann Meyer, James Warden, Andreas Degert

14 years, 10 months

monobristol 0.60.1 & System.NullReferenceException

by APO33

Hi There, Working on new version of APODIO http://www.apodio.org & wiki of the work in progress http://www.apodio.org/wiki (please add ideas there if you feel like!!) I compiled monobristol (bristol GUI) and met the same problem as falktx which to be around here. the erro when starting monobristol is : Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object at MainWindow..ctor () [0x00000] at monoBristol.MainClass.Main (System.String[] args) [0x00000] I followed this message : http://old.nabble.com/Is-anyone-using-monobristol-0.60.1--td29132285.html (which seems to be the same everywhere) I uptaded it with the repository of kxstudio... but same error... did I missed something? I used ubuntu 10.04 thanks for the answer Julien -- APO33 space of research and experimentation http://www.apo33.org info(a)apo33.org

14 years, 10 months

what does "full range" mean with regard to ambisonics and speakers?

by "Bearcat M. Şandor"

Folks, I'm a recovering audiophile. When i was reading the magazines and reading about over priced (in my now opinion) speakers, the words "full range" tended to mean that a speaker was reasonably flat from 20 Hz to 20 kHz. Granted those were unusual. I have read that speakers in an ambisonic set up should be "full range". I'd like to set up a ambisonic speaker system (8 channel to start), and the prospect of 8 full range channels is daunting. Since it seems they would be stand or wall mounted (at least some of them) that means monitors and subwoofers. Since all channels must be the same, that means 8 subwoofers...somewhere in the room. So what does "full range" mean usually and what does it mean in terms of talk on this list? Thanks, Bearcat

14 years, 10 months

wiki.linuxaudio.org, still help needed ?

by Carlo Ascani

I just saw the announce on http://wiki.linuxaudio.org/ "We are looking for front-end developers, web-designers and wiki-administrators to join in." What kind of help do you need? I mean, different from editing wiki content. I could help with little graphics or web-design. You could find me on freenode as 'carloratm' Btw, i've just done these sites: http://gnufunk.org http://radio.gnufunk.org Cheers -- Carlo Ascani La politica pratica consiste nell'ignorare i fatti. (Henry Adams) C programmers never die. They are just cast into void.

14 years, 10 months

Clipping outputs

by Gabriel M. Beddingfield

Hi guys, Is it necc. for me to clamp my audio outputs to [-1.0, 1.0]? Somewhere I got it in my head that I need to clip my output signal (float*) to the range [-1.0, 1.0] before sending my audio signals downstream. However, this is a big time waster. When I review other projects for efficient ways to clip... I can't find any.[1] Looks like nobody's doing it. Thanks, Gabriel [1] I found one in ardour, but it looks like it's just for float->int conversion, and (possibly) not even utilized within ardour.

14 years, 10 months

entailments of probabilistic processing chip for DSP and audio processing?

by Niels Mayer

http://www.technologyreview.com/read_article.aspx?id=26055&a=f A computer chip that performs calculations using probabilities, instead of binary logic, could accelerate everything from online banking systems to the flash memory in smart phones and other gadgets. [...] The electrical signals inside Lyric's chips represent probabilities, instead of 1s and 0s. While the transistors of conventional chips are arranged into components called digital NAND gates, which can be used to implement all possible digital logic functions, those in a probability processor make building blocks known as Bayesian NAND gates. Bayesian probability is a field of mathematics named after the eighteenth century English statistician Thomas Bayes, who developed the early ideas on which it is based. [...] Lyric has been working on its technology in stealth mode since 2006, partly with funding from the U.S. Defense Advanced Research Projects Agency. DARPA is interested in potential defense applications that would involve working with information that isn't clear cut--for example, radio signals distorted accidentally or otherwise, and machine vision systems that try to recognize actions or objects in images. "They're interested in some James Bond-type applications," says Vigoda. Niels http://nielsmayer.com

14 years, 10 months

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Linux-audio-dev August 2010