Linux-audio-user April 2009

linux-audio-user@lists.linuxaudio.org

112 participants
101 discussions

by Atte André Jensen

Hi I'm trying to build ingen and right now the show stopper is that my libraptor is too old (ubuntu 8.04). Before breaking my whole system over I was hoping for some advise, regarding what would be the safest way to update raptor? There doesn't seem to be a lot of apps depending on it. -- Atte http://atte.dk http://modlys.dk

16 years, 1 month

installation weirdness

by Dave Phillips

Greetings, Yesterday I tried to install the i386 version of the new Ubuntu Studio 9.04. I erased some partitions, got everything set up and going swimmingly, then after a while I noticed that the installer had hung up at an error. The error message informed me that the Select And Install Software stage had failed. I chose to continue, went on to install Grub, and then it failed too, with a similar message re: failure to install Grub. Alas, at this point the installer went spinning into the dead zone. I couldn't proceed, the error panel obscured the continuation panel, and I eventually had abort the installation. Fortunately my 64 Studio partition was untouched, and the installer had left my original Grub menu intact, so I still have a workable system on this machine. Incidentally, the error message advises lowering the speed of my CD/DVD drive. How can I make that happen ? The machine is my laptop, an HP G60 powered by a Turion X2. I've had problems installing other systems on this hardware, but some others have installed without complaint (Ubuntu Intrepid, 64 Studio 3b). I'm going to try the 64-bit version today, hopefully I'll have better luck, but I was hoping to install a 32-bit system on this partition. Any advice from the experts before I try the 64-bit install ? TIA, dp

16 years, 1 month

Laptop as portable synth/effects box?

by david

The guitarist in my church band has been using a hefty effects box for years (of course). Our violinist just bought a small one for chorus effects. I should figure out to use my laptop as a synthesizer and effects box and start bringing it along. Or maybe I should set up my wife's old laptop for that - it's got a faster processor in it. Anyway, suggestions/thoughts? -- David gnome(a)hawaii.rr.com authenticity, honesty, community

16 years, 1 month

Setup Walk Through Suggestions.

by Daniel Joshua Worth

I was thinking of dedicating an entire show to getting a linux audio system up and running. I could be biting off more that I can chew. We'll see. So, do you guys have suggestions for compleat newbies to help them get an audio system up and running? Pitfalls, ideas for where to get help? I don't want to try to come up with something step by step, just talk about the concepts so someone who's new to all this won't be so intimidated. Think back to when you first put your setup together. What where the hurdles to getting things working where did you go to get help? What are the absoluter "No, No's" when asking for help? I appreciate in advace your feedback Daniel Worth Host Open Source Musician Podcast. <http://opensourcemusician.libsyn.com/>

16 years, 1 month

generating wavs

by Andrew Gaydenko

Say, I need to generate 1 second, 2 ch, given bps and sr wav filled with (analog) 0.0 except for the only sample in middle with 1.0 value, or some periodic sequence like { -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, ... }, or something else which can be described in few lines of C/Java-like language. What is an appropriate software for such simple tasks? P.S. I see I can use, say, libsnd and do the work. But, probably, some enviroment does exist for such exercises :-)

16 years, 1 month

Multiple Linux Operating Systems on Grub, Help or Info appreciated

by Viktor Mastoridis

small history, I am using Ubuntu Studio for a year now, and with the release of 9.04 Jaunty, I decided to do a clean install of it. As for a long time a wanted to try Studio64, I decided to partition my hard disk and install that as well (Studio64 2.1) I also like and need Frescobaldy, but I just couldn't install it on a Debian platform, so I decided to make one more partition and install Open Suse 11.1. Finally, I made one more partition for future OS tests and one partition for the files. All in all, on my 500gb hard disk I created 6 partitions and installed the OS's in the following order: 50gb partition 1 : Ubuntu Studio 50gb partition 2: Open Suse 50gb partition 3: Studio64 50gb partition 4: empty 180gb partition 5: files 20gb partition 6: swap Now, of course, every OS created it's own boot loader and when I finally installed Studio64, although it recognised the other OS's, and gave me the option to boot into them, a Grub error 12 would appear (no files). Browsing Forums, I bumped across Grub Super Disk and I am able to boot into every single OS from there. But alas, I am not literate enough to create a valid menu.lst on the master boot record. I would appreciate any hints or (links to) simple and clear instructions on the net. I am ready to reinstall all the OS's if needed. I start to understand that a small separate /boot partition would be very useful, but I don't have a clue how to set it up. Viktor

16 years, 1 month

LAC 2009 videos available

by Jörn Nettingsmeier

hi everyone! the videos from lac 2009 are being made available at http://lad.linuxaudio.org/events/2009_cdm/videos/ . most of the footage is there - the missing stuff will follow in a few days as florian (aka faberman) gets home from a production in italy and finds time to encode the rest. the video quality this year is quite stunning - thanks to the theora team for huge improvements in efficiency and quality. if you are a video person and haven't upgraded to the thusnelda branch encoder, do it NOW (before even going for a coffee). then hit #theora on freenode.net and sign hymns of praise until they kick you out. you will note that the videos are raw - they could use trimming some talks consist of several fragments that need concatenating, but due to some stream problems they caused oggCat to barf, even though every single fragment plays ok. your help is appreciated - get in touch with me off-list or via l-a-d if you have worked on the stuff and would like to upload your improved version. best regards, jörn

16 years, 1 month

Re: [LAU] [LAD] [OT] gdm setup in F10

by Kjetil S. Matheussen

Fons Adriaensen: >> >> I had the same trouble recently trying to run >> fvwm with fedora 10. >> >> If you install windowmaker >> using a fedora package, a menu at the bottom >> of the gdm screen should appear. In this menu you >> should be able to choose window manager. >> >> (I saw the menu coincidentally after lots of >> frustration trying to edit .xsession etc.) > > You mean at the bottom of the _screen_, not of > the gdm window ? Yes, at the bottom of the screen. And furthermore, the menu doesn't show up until _after_ you have written your user-name in the gdm window. :-) If it was there it managed rather > well to remain inconspicuous... I also wonder why > my ~/.xsession was ignored. > I just removed gdm and installed xdm. Doing this > leaves you with audio devices owned by root/root > but that's easily corrected in udev (where this > should have been taken care of in the first place). > I think I'll switch to xdm too. I'm suspecting gdm to start pulseaudio, set background color, gtk style, and probably other things I most certainly don't want.

16 years, 1 month

weird csound + qjacktl problem

by becks

Hi all, in my ubuntu 9.04 (vanilla kernel 2.6.29.1 +rt patch), qjackctl (0.34) window crash (randomly) after hitting ctrl c in csound (5.08), but jackd (0.116) keep running this is my csound cmd: csound -+msg_color=false -+rtaudio=JACK -o dac:system:playback_ -i adc:system:capture_ -+rtmidi=ALSA -M hw:3,0 -Q hw:3,0 -m135 -B 4096 file.csd and this my jackd cmd: /usr/bin/jackd -R -dalsa -dhw:0 -r48000 -p1024 -n3 here the screenshot: http://msound.org/tmp/jack.jpg qjackctl.log : http://pastebin.com/m23dbb3a strace qjackctl.bin: http://pastebin.com/m4b7539f7 (output hang after latest "read") any suggestion? thanks -- cb

16 years, 1 month

success with Lexicon Lambda

by Aaron Johnson

Hey Linux Audio heads, I'm happy to announce that after taking the plunge and buying a Lexicon Lambda USB sound interface, that it appear to be working fine for my needs with Linux. specs: MIDI in/out Two channels duplex audio (viewed as one 'track' of stereo, or two tracks of mono) Two phantom powered XLR mic inputs. Two inserts for hardware effects (send and receive on one plug) All in all, a worthy buy....but my big tip for USB audio would be this: make sure to pick your USB port wisely...try to pick one from a bus that has a better IRQ priority (look at the /proc/interrupts output to find a good one, compare to output of 'lsusb' to find optimal port) On my little laptop, it made a HUGE HUGE difference in the occurrence of xruns/dropouts...I had jack setup for ~20ms and still had problems, i.e. gobs of xruns, where with the right USB port, I could get down to 5ms with total stability, even without a low-latency kernel!!! Also, load the snd-usb-audio module with the 'nrpacks=1' option as explained elsewhere. BTW, I'm running Arch Linux on my wife's old Thinkpad X40, much lighter and quieter machine than the old Dell Inspiron 8200 I had been carrying around for years (although the X40 has 4200rpm drives, which I think is slower than the Dell, but so far, I haven't needed faster--we'll see) Best, -- Aaron Krister Johnson http://www.akjmusic.com http://www.untwelve.org -- Aaron Krister Johnson http://www.akjmusic.com http://www.untwelve.org

16 years, 1 month

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Linux-audio-user April 2009