Linux-audio-dev

linux-audio-dev@lists.linuxaudio.org

2 participants
7534 discussions

[linux-audio-dev] jack_callback <-> rest of the world

by Richard Spindler

Hi, I have two questions concerning the jack callback, 1. what is the preferred way of feeding data from disk to the callback? Is there a general design pattern agreed upon? Best Practices? 2. What is the preferred way to notify the non-realtime thread that something happened in the jack-callback? A condition variable? How to avoid blocking? How do you do it? I read the tutorial at http://userpages.umbc.edu/~berman3/ , it uses mutex+condition, is it okay to do this? Are there better ways? thx -Richard

20 years, 2 months

[linux-audio-dev] more on my tascam problem...

by Arnold Krille

Hi all, some weeks ago I sent some mails ranting about problems getting my tascam us-122 to run on a turion64 running gentoo. As time has gone and new kernels arrived I have reached a state where I can play (synths, effects, ardour, etc) and "record" ie. sent the incoming audio to effects and back out. But: If I want to record to disk I get the same old error (should not be here with counts=0) again and sound stops completely. The computer freezes if I try to restart jackd... Some tests showed that this doesn't happen if I record into ram (using /dev/shm to save the recordings). I modified the driver to give some more debug and to not stop at the first error (see the attached usbusx2yaudio.c for details) but still after some more function-calls the driver stops working. Sadly there isn't much documentation in the source so I am a bit lost there. Can someone give my some hints? Thanks in advance, Arnold -- visit http://dillenburg.dyndns.org/~arnold/ --- Wenn man mit Raubkopien Bands wie Brosis oder Britney Spears wirklich verhindern könnte, würde ich mir noch heute einen Stapel Brenner und einen Sack Rohlinge kaufen.

20 years, 2 months

[linux-audio-dev] Re: [admin] attention gmail users [...]

by lazzaro

On Dec 1, 2005, at 9:05 AM, linux-audio-dev- request(a)music.columbia.edu wrote: > > it seems that gmail has an unfortunate default setting that some > people > are not aware of... gmail users, please fix your settings! To be specific, in Settings, choose the "use UTF-8" option for "Outgoing message encoding" on the General page. --- John Lazzaro http://www.cs.berkeley.edu/~lazzaro lazzaro [at] cs [dot] berkeley [dot] edu ---

20 years, 2 months

[linux-audio-dev] [admin] attention gmail users: please fix your message format!

by Joern Nettingsmeier

hi everyone! lately there are a number of gmail users filling up the moderation queues with "message has a suspicious header" bounces. this is almost always due to people trying to send non-text/plain content, which for a number of very good reasons is banned on linux-audio-*. it seems that gmail has an unfortunate default setting that some people are not aware of... gmail users, please fix your settings! best, jörn

20 years, 2 months

Re: [linux-audio-dev] set_rtlimit problem

by Jonathan Woithe

Hi Lee > I just noticed that the sys_get_priority_max and _min syscalls do not > take the RT priority rlimit into account. Since the watchdog thread > runs at the -P setting + 10 then if the rlimit is 50 and the user > specifies -P50 the watchdog thread will fail. > > I believe sched_get_priority_max(SCHED_FIFO) needs to take the rlimit > into account - there's no other way to get the upper limit AFAICT. I'm not sure what the "set_rtlimit problem" is here - I'm a little confused. In terms of what set_rtlimits does, it seems to me that the watchdog thread issue can be easily dealt with: define the max rtpriority value in /etc/set_rtlimits to be X, knowing that the maximum jackd "-P" option value one can use is X-10. Certainly getrlimit()/setrlimit() (which set_rtlimit uses to do its thing) seem to take the current rtpriority rlimit into account. The former also returns the rlimit hard limit for the process, which I interpret to be the "upper limit" mentioned in the original email. In testing I've done during development, set_rtlimits seems to do the right thing, based on my understanding of what the right thing is. If I've misunderstood something though I'm happy to be corrected. Regards jonathan

20 years, 2 months

[linux-audio-dev] [ANN] QjackCtl 0.2.19a fix released!

by Rui Nuno Capela

Hi, Just to let you know about this small-fix release on QjackCtl, that only affects the MIDI connections (re)nomenclature: - ALSA sequencer client/port name aliases are functional again; all actual MIDI sequencer client/port numerical identifier prefixes are also back in business. Apparentely, this has been missed for quite a while, almost since 0.2.16. Only noticed this late week, thanks to Domenico Culturato. You can pick it out from the usual place: http://qjackctl.sourceforge.net Enjoy, -- rncbc aka Rui Nuno Capela rncbc(a)rncbc.org

20 years, 2 months

[linux-audio-dev] hdsploader not doing it

by Janina Sajka

Regret to report I am having problems loading firmware for my multiface again. This time I have the pci card in a 32-bit system running FC4 with a recent 2.6.12 kernel and alsa from 1.0.10rc1, including alsa-tools-1.0.10rc1. The error is: Hammerfall-DSP: wait for FIFO status <= 0 failed after 30 iterations Hwdep ioctl error on card hw:1 : Input/output error. -- Janina Sajka Phone: +1.202.494.7040 Partner, Capital Accessibility LLC http://www.CapitalAccessibility.Com Chair, Accessibility Workgroup Free Standards Group (FSG) janina(a)freestandards.org http://a11y.org If Linux can't solve your computing problem, you need a different problem.

20 years, 2 months

[linux-audio-dev] set_rtlimit problem

by Lee Revell

Hey, I just noticed that the sys_get_priority_max and _min syscalls do not take the RT priority rlimit into account. Since the watchdog thread runs at the -P setting + 10 then if the rlimit is 50 and the user specifies -P50 the watchdog thread will fail. I believe sched_get_priority_max(SCHED_FIFO) needs to take the rlimit into account - there's no other way to get the upper limit AFAICT. Lee

20 years, 2 months

[linux-audio-dev] Echo Gina3G

by conrad berhörster

Hello all, sorry for crossposting. Is there any experience with the Echo Gina3G card. link: http://www.echoaudio.com/Products/PCI/Gina3G/ thanks c~

20 years, 2 months

[linux-audio-dev] xruns

by conrad berhörster

Hello list, well i try to understand the reason of xruns. when will they appear? for me it's curious, that , while copy a big file (> 50MB ) or many small one, there are xruns. so, it seems, that it has nothing to do with the soundcard buffers. any comments? sizu c~

20 years, 2 months

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