Linux-audio-user December 2009

linux-audio-user@lists.linuxaudio.org

166 participants
190 discussions

by Atte André Jensen

Hi A friend of mine has invited me to compose for some videos he's planning on making. We haven't started yet, but I thought it might be good to be a bit ahead, especially since I haven't done this before and I know next to nothing about video... The noise making apps will be running ontop of jack. Google suggest I should look into xjadeo with the -i switch. Is that it? Anything (formats, codecs, framerates, interlaces other-stuff-I-dont-get) that I should ask for or try to avoid? Any input, including links, tips, thoughts, would be highly appreciated! -- Atte http://atte.dk http://modlys.dk

16 years

Re: [LAU] arch users?

by drew Roberts

On Thursday 03 December 2009 09:06:35 you wrote: > On Thu, 2009-12-03 at 08:09 -0500, drew Roberts wrote: > > On Thursday 03 December 2009 05:04:26 Ng Oon-Ee wrote: > > > > Oh, I was thinking Golden Arch Linux would be the paid-support > > > > version of Arch Linux. > > > > > > Quite difficult to have a 'paid-support' version of a distro that's not > > > owned/managed by a company =). > > > > Yup, but not too difficult to have paid support for a distro that's not > > owned/managed by a company.Right? > > > > all the best, > > > > drew > > I guess. Doubt it'd be a good economic prospect in any case, considering > the user base either:- > a) doesn't need your help > b) needs your help but won't pay for it cos "OMGZZ THIS ISN'T WINDOWS > WHY SHOULD I PAY" > > Disclaimer: I use Arch myself, and I know very very few users who fall > into b). Few isn't none, however =) Well, Free Software is not going to make it some places unless this problem is solved. You need to have paid support in both one off and contractual options for the distro and apps available for a Free distro and app system. A vendor lock in play on the distro or app front is not going to really cut it. Why would someone seeking to get away from the vendor lock in game they are in now move to another vendor lock in game with a twist. By the same token, they will not move to a Free game if they cannot assure themselves of support "on-demand" as they know they need it. And hiring bodies to provide the paid support for the Free game is not cost effective in all situations. all the best, drew

16 years

jconv conf file question

by Ken Restivo

I've been trying to find where I had once seen some documentation of the jconv conf file format, but can't find it. The headings are: in out gain delay offset length chan file Now, in and out are the count of input and output channels, and gain is pretty self-explanatory. "delay", I'm remembering from experimentation some years ago, is the pre-delay, i.e. after the sound is received and before it is applied to the impulse, yes? Offset and length are ways of "chopping" or trimming the impulse, right? i.e. "offset" to remove any noise in the impulse WAV prior to the crack, and "length" to trim off residual noise after the echoes die down. I'm not sure what "chan" is, though it seems like it wants to be the same as "out"-- the number of channels of the file. "file" is pretty obvious. One more question: is there any way to route input channels to output channels inside jconv? i.e. if I have two input channels, X and Y, and 4 output channels, A, B, C, D, is there some way to route X->A, Y->B, X->C, Y->D ? -ken

16 years

phasex compile problems

by Adriano Petrosillo

Hi, I tried contacting phasex's developer, but with no reply. Maybe you will be able to give me a hand. I incurred in the following compile error: gcc -DHAVE_CONFIG_H -I. -I.. -I/usr/include/alsa -I/usr/local/include -I/usr/include/gtk-2.0 -I/usr/lib/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/lib/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -D_GNU_SOURCE -D_REENTRANT -DPHASEX_CPU_POWER=2 -pipe -Wcast-align -mtune=native -march=native -m32 -O3 -ffast-math -fomit-frame-pointer -MT gtkui.o -MD -MP -MF .deps/gtkui.Tpo -c -o gtkui.o gtkui.c gtkui.c: In function ‘widget_set_backing_store_ callback’: gtkui.c:2101: error: ‘group’ undeclared (first use in this function) gtkui.c:2101: error: (Each undeclared identifier is reported only once gtkui.c:2101: error: for each function it appears in.) make[2]: *** [gtkui.o] Error 1 make[2]: Leaving directory `/home/keysschool/zynaddsubfx/phasex-0.12.0/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/home/keysschool/zynaddsubfx/phasex-0.12.0' make: *** [all] Error 2 I have a Pentium Dual-Core processor, so I enabled compile flags --enable-arch=native --enable-cpu-power=2. ./configure only asked me for libsamplerate and it ran smoothly after I installed it, and I'm positive I have libgtk(whatever)-dev installed as well. I'm running Ubuntu 8.10. Thank you, Adriano

16 years

Ubuntustudio question

by Dave Phillips

Greetings, Hopefully this isn't OT for this list, but my account at UStudio is screwed up and I can't log in there. Anyway, a simple (?) question: How can I restore the UStudio theme to the top and bottom menubars ? IIRC I deleted a package yesterday and had to delete the ubuntustudio-audio metapackage. That might have messed things up, but reinstalling that package is not possible now, I have too many custom-built apps that would be overwritten by the package. I've reinstalled all the theme-related ustudio packages, got no joy on the menubars. Incidentally the icon in the top left-corner of the display is now the default Ubuntu icon, not the nice UStudio icon. The default Jaunty theme on the menubars is just god-awful. It's got to go. So how do I get it gone ? Best, dp

16 years

Do I have Real-Time (Complete Preemption)?

by Martin Horn

Hi All, I made an install of ubuntustudio 8.04.3 hardy and am running a kernel called 2.6.24-25-rt. I need to set the priority of my interrupts with chrt but this does not work. I read that I need a Complete Preemption kernel and assume I don't have. How can I find out? How can I get a Complete Preemption kernel. Do I need to build it? Thanks a lot! Martin

16 years

Another finished Linux/monome track: "something wrong with your feet"

by Will Light

Hey again everyone, I recently participated in a remix project (no winner or prizes, just for fun) started on the monome.org forums. The gist was that everybody participating submitted a sample no more than 30 seconds long, everybody received a zip pack of all the samples, and the final tracks could only consist of samples from the pack (excluding the sample that the participant him/herself submitted). The turnout was upwards of 20, so there was plenty of material to work with, and it was tons of fun. An additional stipulation was that the final submission should utilize a monome in some way (if you are not familiar with the monome, I would highly suggest reading about it at http://monome.org/series/). I opted to export all the loops from my project and load them into rove, an application I wrote for loop-slicing with monome devices. In essence, each row of buttons (except the top) represents one loop of audio, and the lit button represents the playhead. Each loop is a member of a choke group from which only one loop may be playing at a time. The first n buttons from the left on the top row light up when that group number is playing, and functions as a "stop" button for that group. The entire process of producing this remix was done on Linux, using Renoise for the sample mangling (and paulstretch a few times, as well) and my libmonome and rove projects for the final performance (both of which can be cloned from my github account, http://github.com/visinin). I have both audio and video up of the performance I submitted. Though the video's not very visually interesting, I'd still recommend giving it a watch. http://www.youtube.com/watch?v=nxlAFG7MA8o http://soundcloud.com/visinin/something-wrong-with-your-feet http://visinin.com/~will/vsn-something_wrong_with_your_feet.ogg enjoy :) -w

16 years

logical AND in Faust

by Bjoern Lindig

Hi, I tried to post this to faust-users-list, but since I changed my email-adress this was refused. Now, after spending a week of "awaiting moderator approval", I decided to post my question here, and I hope that some of the faust-guys might be around. I have a problem understanding this piece of faust-code: index( n ) = &( n - 1 ) ~ + ( 1 ); It is from the faust-soft-computing.pdf. I do understand that it works like a counter and I think it should jump back to 0 when it reaches n - 1. But what exactly is the logical AND operator doing? In the quick reference it is sayed, that primitives behave like their C counterpart. O.k. I don't have any experience in C, but I realy tried to figure this out. To me it seemed, that the "&" operator in C would give back the smaller value of the two compared. So in this case it would give pack the line from 0 to n-1 and then continue with streaming n-1. But that would not make any sense if it is used in a delay-line, to calculate the read/write index, does it? Please correct me if I missunderstood something and thank you for help. Kind regards, Bjoern

16 years

Music made with linux - Den yndigste rose er funden

by Atte André Jensen

Hi Today is 1st sunday of advent, and to celebrate that I uploaded a piece of (not your average) christmas music in the Modlys player: http://music.modlys.dk/track/den-yndigste-rose-er-funden Direct link to mp3 is here: http://modlys.dk/mp3/den_yndigste_rose_er_funden.mp3 Lyrics are from the danish christmas carol "Den yndigste rose er funden" (The lovelies rose has been found), everything else, including new melody, is by me :-) -- Atte http://atte.dk http://modlys.dk

16 years

Update of jconv

by fons＠kokkinizita.net

Hello all, Updates of jconv, now called jconvolver, and the zita-convolver library are available on the usual place: <http://www.kokkinizita.net/linuxaudio/downloads>/ The new zita-convolver is API-compatible to the previous release but not binary compatible. If you have any code using it please recompile. Release notes for jconvolver and fconvolver 0.8.4 ------------------------------------------------- Jconvolver is a real-time convolution engine. It can execute up to a 64 by 64 convolution matrix (i.e. 4096 simultaneous convolutions) as long as your CPU(s) can handle the load. It is designed to be efficient also for sparse (e.g. diagonal) matrices. Unused matrix elements do not take any CPU time. In contrast to e.g. BruteFir, jconvolver uses multiple partition sizes, small ones at the start of the impulse response and progressively longer ones for the rest. This allows it provide both zero processing delay while still remaining efficient in CPU use. Fconvolver performs the same processing on files instead of real-time. For this relaese the package and the binaries have been renamed to avoid a conflict with an existing 'jconv' package (related to the Japanese language). Functionally this version is identical to jconv 0.8.0. See README.CONFIG for the syntax of the config files. Since 0.8.0 it has been possible to name and connect the Jack ports. The related commands have been added to README.CONFIG. Jconvolver will work with libzita-convolver 1.0.0, but upgrading to 2.0.0 is recommended. Note that if you update the library you have to recompile this package. NOTE: Jconvolver will normally not work correctly when used with Jack's freewheeling mode, e.g. when exporting in Ardour. It _could_ actually work when used on a single processor system, but don't rely on this. This release of jconvolver will print a warning when freewheel mode is entered. The 'mkwavex' utility from previous versions has been replaced by 'makemulti' which offers some more options. Enjoy ! -- FA Wie der Mond heute Nacht aussieht ! Ist es nicht ein seltsames Bild ?

16 years

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Linux-audio-user December 2009