Linux-audio-user December 2008

linux-audio-user@lists.linuxaudio.org

144 participants
133 discussions

by Josep Andreu

Hi I have start a new project, a set of audio plugins, the first idea is port all the ZynAddSubFx effects to LADSPA and add my small contibution with some others. I have been ported yet the Chorus,Alienwah, Reverb, Phaser and EQ Zyn effects..... and some more ...all the plugins are in individual libs that you need to compile separated, that was the first idea in order make easy to revise the code, if someone wants to do. No tarballs are relased at this momment ... only CVS access. Also RDF files are not available and any kind of help to create is welcome in this regard, rt problems or comments are welcome, please check in: http://holap.berlios.de Josep Andreu <holborn(a)telefonica.net>

15 years, 11 months

jackd process can't be killed

by R Dicaire

I'm running Debian Lenny on a custom 2.6.26.8-rt12 kernel. I notice once jackd starts, it cannot be killed. kill -9 leaves the jackd process in state DLs D Uninterruptible sleep (usually IO) L has pages locked into memory (for real-time and custom IO) s is a session leader Running jackd -R -P70 -dalsa -dhw:0 -r44100 -p128 -n2 -Xseq I get same behaviour from kernel 2.6.26.6-rt11. Running in non-RT mode shows same behaviour ice-1712 chipset M-Audio Delta 44 jackd version 0.109.2 tmpdir /dev/shm protocol 22 I built jack 0.116.x, alsa 1.0.18x, and still get same behaviour. This kernels alsa driver is 0.16, upgraded to current 1.0.18a, same behaviour. This whole situation is disheartening as I once had a working setup on an older Ubuntu distribution where I could use skype with alsa's jack plugin (yes, I know, Ubuntu doesn't ship it, I had to rebuild libasound2-plugins pkg), but other alsa/jack issues forced me to have to dump Ubuntu altogether. I discovered the inability to kill jackd process while trying to troubleshoot skypes use of alsa's jack plugin crashing jackd. Also discovered any process that invoked that plugin would crash jackd when the plugin thread disconnected from jackd. In all it seems my jack setup is now unstable. Any help in troubleshooting these problems would be appreciated, thank you. -- aRDy Music and Rick Dicaire present: http://www.ardynet.com http://www.ardynet.com:9000/ardymusic.ogg.m3u

15 years, 11 months

encoding aac/m4a for wii

by Atte André Jensen

Hi We got a wii for christmas, and it seems it can only handle audio in "aac (.m4a)" format. However I have no experience with this format, but I found faac and did "faac someaudio.wav", which produced someaudio.aac and I also made a copy with extension .m4a. However the wii couldn't find any audio files if I copied the .aac-file to the sd-card. If I copied the .m4a file the files showes up in photo channel, but the wii can't play them (something with "wrong format"). Any ideas and/or experiences with encoding for the wii in particular or aac/m4a in general? -- Atte http://atte.dk http://modlys.dk

15 years, 11 months

disappointing experience with firewire

by Susanne Schneider

hi, this is no complaint (!) about anything, just to reflect over my yesterday's exerience with a newly purchased Focusrite Saffire Pro10, connected via Belkin PCMCIA Firewirecard to my Lenovo R61 - the FW Chip in this Laptop is one of those crappy Ricoh parts, I tried this, too, but as expected it just didn't work... So I compiled the ffado Release Candidate, afterwards compiled the actual Jack 0.116.1 and finally got things running. Compared to my Lexicon Omega Studio USB Device the performance of that FW assembly (don't want to blame a single device of that chain) just was disappointing, already in idlemode without any clients open the jackserver showed a workload of roughly 5% (128 frames/3 periods), while my Lexicon produces between 0.5 to 1% (128 frames/2 periods). Opening Ardour and just replaying one of my sessions produced glitches where only a strong hiss could be heard. (The session itself caused a workload of less than 20%.) - I remember having had those hiss glitches in my early days in 2005 with the MAudio Transit USB and Kernel 2.6.11 - I never expected them coming back some day... *lol* I then had a look on my interrupts and had to notice the FW Card sharing it's interrupt (no 16) with the Nwidia Graficscard - so I might have found the culprit - or not? - I don't know... :-((( I tried to change the pci settings in the bios - no success. Now my question to those who also tried firewire audio: was it a success story for you from the beginning or did anybody make similar experiences and how did you proceed further? thanks for your attention Susanne

15 years, 11 months

Livecoding in The Hague - Monday, December 22

by nescivi

Hiho, Monday evening, December 22nd, I will be doing a little SuperCollider (on Linux) livecode session, in The Hague, Cafe De Vinger (close to the Stadhuis and Public Library). There will be lots of other interesting music going on by two of my favorite DJ's (both from The Hague) and analog electronic blippo-box improvisation (the evening is curated by Kassen). sincerely, Marije

15 years, 11 months

Re: [LAU] jackd process can't be killed

by R Dicaire

On Wed, Dec 31, 2008 at 10:13 PM, Ken Restivo <ken(a)restivo.org> wrote: > What exactly is the MIDI problem, and how could I duplicate it here? I'd be happy to test with this kernel (on a x86 Atom) and see if it is solved. Anything that tries to open the alsa sequencer device hangs. -- aRDy Music and Rick Dicaire present: http://www.ardynet.com http://www.ardynet.com:9000/ardymusic.ogg.m3u

15 years, 11 months

A QJackctl question

by Joe Hartley

I have a Behringer BCF2000 control surface, and every time I start QJackctl and Ardour, I have to manually connect the control, mcu and seq input and output ports from Ardour to the BCF. I used to have QJackctl set to make these connections automatically, but I find that at some point something changed. Now when I go into the patchbay and go to the ALSA tab, I cannot choose any of these ports and have the Connect button light up, so I can't save the configuration with these connections already in place. What can I do to get these to connect automatically? Thanks! -- ====================================================================== Joe Hartley - UNIX/network Consultant - jh(a)brainiac.com Without deviation from the norm, "progress" is not possible. - FZappa

15 years, 11 months

Re: [LAU] jackd process can't be killed

by R Dicaire

On Wed, Dec 31, 2008 at 4:06 AM, andy baxter <andy(a)earthsong.free-online.co.uk> wrote: > /usr/lib/alsa-lib doesn't include this plugin.) I'm running linux mint, > which is based on Ubuntu. I've googled for a definitive guide but can't find Ubuntu does not include the alsa jack plugin. You'd have to rebuild that pkg to include jack. -- aRDy Music and Rick Dicaire present: http://www.ardynet.com http://www.ardynet.com:9000/ardymusic.ogg.m3u

15 years, 11 months

Problem with PCM2706 and TAS1020B

by Michelle Konzack

Hello *, Today morning I have goten a bunch of FreeSamples from Texas Instruments to develop a new docking station and I have build the two PCB's with the chips PCM2706 and TAS1020B (+ Maxim MAX9853 + MAX9708) The first one should be working from scratch, but it is not detected by the Linux Kernel 2.6.18 and 2.6.28. Coult it be, that the ALSA Audio modules refuse to detect it, since I have NO VID and PID programmed? -- Any hints? For the second one it is more complicate, because it is a streaming controller I must code an 8052 compatibel Firmware. -- Any hints and resources? Thanks, Greetings and Happy New Year Michelle Konzack Systemadministrator 24V Electronic Engineer Tamay Dogan Network Debian GNU/Linux Consultant -- Linux-User #280138 with the Linux Counter, http://counter.li.org/ ##################### Debian GNU/Linux Consultant ##################### <http://www.tamay-dogan.net/> <http://www.can4linux.org/> Michelle Konzack Apt. 917 ICQ #328449886 +49/177/9351947 50, rue de Soultz MSN LinuxMichi +33/6/61925193 67100 Strasbourg/France IRC #Debian (irc.icq.com)

15 years, 11 months

ongoing saga of jackd, alsa jack plugin, skype, and flash in firefox

by R Dicaire

Hi folks In my continuing quest to get skype and flash to use alsa's jack plugin, here's what I've achieved so far. I've built current jack and alsa, defined a custom PCM device in .asoundrc, configured skype to use that device, and now this works without crashing jackd. I didn't have as much luck with flash though. I defined default PCM to use the same slave as the skype PCM uses, and in qjackctl I see attempts by the jack plugin to connect to jackd while viewing a youtube video, but a connection doesn't seem to be maintained, and no sound is heard. While this isn't critical for me as I don't go to youtube anyway, I was hoping this would have been a good test of using the jack plugin as a default PCM. Anyone else been successful in using the jack plugin as a default device and getting flash audio to use it? -- aRDy Music and Rick Dicaire present: http://www.ardynet.com http://www.ardynet.com:9000/ardymusic.ogg.m3u

15 years, 11 months

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Linux-audio-user December 2008