Linux-audio-user January 2009

linux-audio-user@lists.linuxaudio.org

165 participants
173 discussions

Driver for a Behringer BCD2000

by Steven Tonge

Hi, Does anyone have a Linux driver for a Behringer BCD2000? Or any interest in writing one? Thanks Steven -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.

16 years, 10 months

Last RT Kernel + Alsa Seq working

by Josep Andreu

Hi ... Here ... 2.6.26.3-rt3 works .... then next one I was try was ... 2.6.26.5-rt9 and fails to kill apps ... Maybe some intermediate versions run too .... can anyone confirm? -- Josep Andreu <holborn(a)telefonica.net>

16 years, 10 months

disappointing experience with firewire - the lucky ending

by Susanne Schneider

this is just to bring the story to it's end: after finding the patience to read all the valuable hints on ffado.org and doing some tweaking I now have a fine and stable running system - the Focusrite Saffire Pro10 is really a great deal. Also the IRQ-sharing issue is solved by disabling the NVIDIA driver. Thanks a lot again for all your comments, Susanne

16 years, 10 months

kernel and midi seq

by R Dicaire

Is the midi seq brokenness in newer kernels attributed to the real time patches only? And does anyone know what specific real time kernel patch and level still has a working midi seq? -- aRDy Music and Rick Dicaire present: http://www.ardynet.com http://www.ardynet.com:9000/ardymusic.ogg.m3u

16 years, 10 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

16 years, 10 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

16 years, 10 months

command line playlist (m3u) creator anyone?

by Kevin Cosgrove

Anyone know of a nice command-line playlist creator? I'm thinking of something like: playlist-creator directory -o directory.m3u Thanks.... -- Kevin

16 years, 10 months

no. of periods vs. estimated spare time

by Dan Muresan

[posted before in qjackctl help forum, which seems inactive] Hi, I am seeing xruns with jackd. I'm using a real-time kernel and played with rtprio settings, sampling rate, number of periods, and buffer sizes with little luck. I need some clarifications on how Jack is supposed to behave. 1. What does qjackctl display in red? It's two numbers, like "3 (2635)", but I have no clue what they are. The first number stays small, but the number in parantheses increments like crazy. 2. I see lots of "delay of 11618 usecs exceeds estimated spare time of 11553.0 usecs; restart" messages. But the "estimated spare time" only seems to depend on the number of frames per period (jackd -p argument). So even if I increase the number of periods (jackd --nperiods argument) insanely, I still get these "restarts" just as often. This doesn't seem right -- with a larger n * bufsize, the restarts should at least become less frequent, right? I don't care at all about latency -- I just want continuous audio (and preferably quiet operation). Is there a way to get rid of these warnings (and the presumably harmful resets)? Thanks, Dan Muresan

16 years, 10 months

Advice on scripted assembling and mixing of a Radio Show

by drew Roberts

I have started a radio show called the Midnight Freedom Show. I plan on featuring one Free licensed song each night just after midnight. It is expected to play on Y98 in the Bahamas but I am also in discussions to get it to play on several college radio stations as well. (If you can help me get it on other stations as well, all help would be appreciated.) What I think I need to do is something like: [Station Name] this is Z bringing you the Midnight Freedom Show, tonight featuring [Song Name by Artist] etc. [song plays] That was [Song Name by Artist] here on [Station Name] etc. Show ends. Oh, and there is a bed playing under the DJ bits. So, the show should be "customized" for each station but I don't want a huge workload for myself and I don't want to push the work down to the stations unless they want it. So I am wondering if anyone has any ideas on how to script this up so as to assemble the bits automatically for each station. (I hope what I am asking is clear, if you need clarification, please question me until things clear up.) I think I am going to look into the possibilities of ecasound first. all the best, drew

16 years, 10 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

16 years, 10 months

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Linux-audio-user January 2009