Linux-audio-user December 2007

linux-audio-user@lists.linuxaudio.org

151 participants
147 discussions

[LAU] A year of Linux Audio revisited - would like to know your oppinion

by Sebastian Tschöpel

Hi all, I started to work with audio software on Linux about one year ago and wrote down my experiences in a small weblog. Since I managed to get things on the way, I thought it would be time to sum up the experiences I made in the past year. The result is a small midterm-report and I would be glad to hear some of your thoughts. Not about the article itself but about the questions I had before I started to use Linux as audio production base, about the answers you might have found and about your personal Likes and Dislikes. Link: http://www.sternenhejim.de/index.php?option=com_content&task=view&id=97&Ite… -- Best regards, Sebastian. Web: linuxaudioblog.sternenhejim.de

18 years, 1 month

[LAU] yoo hoo, Ken Restivo, CQ calling Ken...

by Frank Pirrone

On Friday 14 December 2007 05:29 am, you wrote: >>>> > > > >3.a. Please send us music using a Free License that you made using our >>>> > > > > stuff. If you don't have any originals of your own, here is where you >>>> > > > > can find some to do your own take of and send in. We can include this >>>> > > > > as a showcase of our stuff. >>>> > > > > >>>> > > > >3.b. Help us put together a CD of such Free Music that we can sell and >>>> > > > > let the proceeds support the project. *** >>>> > > > > You are welcome to use any or all of my music at > > http://www.restivo.org/blog/ for this purpose. > Hey Ken, what was this thread all about. I didn't follow it on LAU but it sounds like that upcoming contribution or something. I hope to post several concept mixes tonight, and have a few more to follow those. I seem to be in something of a vein that I'd like to mine further. Frank

18 years, 1 month

[LAU] Strange problems with Audacity

by Sebastian Tschöpel

Hi, i've got a question because I don't know where else to search..... I tried working with Audacity for a while. I tried different versions, rpm-packages, installing via package manager, compiling from source (all successful), as root and user and so on.... But everytime when I try to start audacity (with jack running or not) I get a friendly but plain: "Segmentation fault" When I try it a second time, nothing happens and then a zombie-like audacity process can be found in the process list that even can't be killed by killall or kill pid. I use openSuse10.2/JAD1.0 and I would be glad for any suggestion. -- Best regards, Sebastian. http://linuxaudioblog.sternenhejim.de

18 years, 1 month

[LAU] Does anyone know if the Minprint TRIO USB is compatible with Linux ?

by M U

Well the Topic says it all... Heute schon einen Blick in die Zukunft von E-Mails wagen? Versuchen Sie´s mit dem neuen Yahoo! Mail. www.yahoo.de/mail

18 years, 1 month

[LAU] get tabs out of a song (changing tempo)

by dinux d

Hi, I want to listen to a song of Jimmy Hendrix carefully to uncover his cords and tabs and play a long with him eventually. How can I change the tempo of a song? And if I want to repeat a particular part of a song, can I cut that part out of the song with audacity, or what is the best way to do this? Further tips are welcome. Best regards, Dinux

18 years, 1 month

[LAU] VOIP and JACK

by Ken Restivo

Thanks for the advice on VOIP for Linux. I'm now on ekiga.net, using diamondcard for POTS gatewaying, and so far so good. Only thing is, sometimes it really sucks having to use a separate audio interface for the phone and for JACK. Are there any JACK plugins for ekiga, or JACK-enabled versions of ohphone, or any other VOIP software for linux? Have any of them been jackified? -ken

18 years, 1 month

[LAU] Convolver?

by Ketil Thorgersen

Hi list I have been browsing for convolver/impulse respons plugins for linux and have found a few: brutefir, jace, jack-convolve and dssi-convolve. The only ones with guis are the two later ones which is also the simplest, and which seem to be discontinued. I have not tried jace, but brutefir seems to be quite complicated to use. Does anyone know if someone is worling on an easy to use (for a beginner) convolve plugin for linux - preferably as a ladspa plugin?? Just curious! There are so many impulses out there of great gear and spaces! Best regards

18 years, 1 month

Re: [LAU] A year of Linux Audio revisited - would like to know your

by Kjetil S. Matheussen

On Fri, 14 Dec 2007, Stéphane Letz wrote: >> >> Paul Davis: >> > >> > > Unless jack is >> > > fixed (or extended) so that it can recover from errors (including >> > > letting its latency be adjusted on the fly) >> >> <...> >> > >> > JACK has a number of problems, some of them significant. The things >> > you've spoken about are not among them. >> > >> >> I'm not sure what other problems you are thinking of? I completely >> agree this is the main problem with jack. Its not unusual that a >> program connecting to jack can make jackd crash. And it is >> even possible to prevent this! (I know it tries to prevent >> it though, but it does fail very often too). > > Is it something occurring in jackd only? or also jackdmp? > I'm not sure. I haven't used jackdmp that much. But here is a way to check. 1. Start jackdmp -R 2. Start xmms 3. Play something in xmms 4. Start jackrack 5. Load this ladspa plugin: http://www.notam02.no/arkiv/src/ladspasleep.tar [1] 6. Drag the "usecs to sleep" slider quite high. 7. Enable the plugin. 8. Drag the "usecs to sleep" slider back and forth a lot. This is a quite sure way to make jackd crash. >> >> >> The second problem I have with jack is that its not possible >> to pause or disconnect temporarily from a backend, which >> means that whenever you want use a program which use a >> soundsystem which does not support jack (in my case, usually >> flash, vmware or java), you first have to quit all >> programs currently using jack, then stopping jack, then start >> the non-jack compatible program. And after being finished >> with the non-jack compatible program, start jack and all >> its clients again. There was even posted a fix to this bug >> on the jack list a few years ago, but of course it was not adopted. > > Do you remember what was the idea behind the fix? Was it a new API so > suspend/resume the backend? > I think it was only for the alsa backend. It was recently reposted on the list too. [1] I had to edit it a bit to make it compile now: ttleush ladspasleep # diff -u sleep.c~ sleep.c --- sleep.c~ 2003-06-29 15:10:31.000000000 +0200 +++ sleep.c 2007-12-14 18:33:21.000000000 +0100 @@ -99,6 +99,7 @@ void _init() { LADSPA_Descriptor *vd; LADSPA_PortDescriptor *portdescriptors; + LADSPA_PortRangeHint *portRangeHints; char **portnames; fprintf(stderr,"Initing sleep"); @@ -125,9 +126,11 @@ portdescriptors[1]=(const LADSPA_PortDescriptor)(LADSPA_PORT_OUTPUT|LADSPA_PORT_AUDIO); portdescriptors[2]=(const LADSPA_PortDescriptor)(LADSPA_PORT_INPUT|LADSPA_PORT_CONTROL); - vd->PortRangeHints[2].HintDescriptor=LADSPA_HINT_BOUNDED_BELOW| LADSPA_HINT_BOUNDED_ABOVE; - vd->PortRangeHints[2].LowerBound=0.0f; - vd->PortRangeHints[2].UpperBound=1000000.0f; + portRangeHints=(LADSPA_PortRangeHint *)(vd->PortRangeHints); + + portRangeHints[2].HintDescriptor=(LADSPA_HINT_BOUNDED_BELOW| LADSPA_HINT_BOUNDED_ABOVE); + portRangeHints[2].LowerBound=0.0f; + portRangeHints[2].UpperBound=1000000.0f; portnames[0]=strdup("Audio in"); portnames[1]=strdup("Audio out");

18 years, 1 month

[LAU] lv2

by Julien Claassen

Hi everyone! I've been looking for this slv2 package, which apparently contains lv2_jack_host but I can't really find it on the net. Can anyone tell me where to get it? Kindest regards Julien -------- Music was my first love and it will be my last (John Miles) ======== FIND MY WEB-PROJECT AT: ======== http://ltsb.sourceforge.net the Linux TextBased Studio guide ======= AND MY PERSONAL PAGES AT: ======= http://www.juliencoder.de

18 years, 1 month

[LAU] Rubber Band v1.0.1 - an audio time-stretching and pitch-shifting library and utility

by Chris Cannam

Rubber Band is an audio time-stretching and pitch-shifting library and utility designed for musical applications. http://www.breakfastquay.com/rubberband/ It includes a library that supports a sample-accurate multithreaded offline mode and a real-time lock-free streaming mode; a command-line utility program; and a LADSPA pitch-shifter plugin. Rubber Band is Free Software under the GNU GPL. This small update (v1.0.1) fixes an option parsing bug and a dodgy bit of #ifdef nesting. The core code is the same as in 1.0. Chris

18 years, 1 month

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Linux-audio-user December 2007