Linux-audio-user May 2006

linux-audio-user@lists.linuxaudio.org

184 participants
187 discussions

Re: [linux-audio-user] My MIDI latency is crap

by Pedro Lopez-Cabanillas

On Friday, 5 May 2006 13:44, Lee Revell wrote: > I actually discussed this with Joachim from the MuSE team at LAC - we > need a way for applications that need a low latency capable kernel to > discover whether the kernel is good enough. One option would be to > simply make MuSE depend on a "known good for audio" kernel in the > package manager which is probably too aggressive, and not reliable > enough. A better solution would be to have a simple, user friendly app > that does a latency test and reports the results, and if a problem is > found would recommend that the user upgrade the kernel, change some > config options or file a bug report with their distro. > > Unfortunately it's a tricky problem, as you can see there's not even a > distro independent way to check the kernel config. If the program uses the ALSA Sequencer, there can be several timer sources available. The ALSA-RTC timer driver had very bad luck, plagued with problems in many kernel versions, but gives good resolution when it is available. The system timer is always present, but its resolution depends on the HZ setting in the kernel. You can use the timer interface from ALSA to retrieve the resolution of the system timer (or any other timer driver): http://www.alsa-project.org/alsa-doc/alsa-lib/group___timer.html Of course, this ALSA timer infrastructure is relevant only if your program uses ALSA Sequencer scheduling capabilities or event timestamping. Regards, Pedro

18 years, 4 months

[linux-audio-user] lost user access to alsa

by plutek

greetings! i'm using a laptop with ubuntu dapper, 2.6.15 kernel (with ingo's patch), alsa 1.0.10, and jackd 0.100.0. this system was working flawlessly with with both the onboard soundcard and my RME Multiface, with realtime access as user, until a recent install of some dvd-playing apps. now, when i try to bring up jack *as user* i get: --------------------------- |~: /usr/bin/jackd -R -m -dalsa -r44100 -p128 -n2 -D -Chw:1,0 -Phw:1,0 jackd 0.100.0 Copyright 2001-2005 Paul Davis and others. jackd comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details JACK compiled with System V SHM support. loading driver .. apparent rate = 44100 creating alsa driver ... hw:1,0|hw:1,0|128|2|44100|0|0|nomon|swmeter|-|32bit control device hw:1 ALSA lib confmisc.c:1107:(snd_func_refer) Unable to find definition 'defaults.pcm.subdevice' ALSA lib conf.c:3493:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:3951:(snd_config_expand) Args evaluate error: No such file or directory ALSA lib pcm.c:2102:(snd_pcm_open_noupdate) Unknown PCM hw:1,0 ALSA lib confmisc.c:1107:(snd_func_refer) Unable to find definition 'defaults.pcm.subdevice' ALSA lib conf.c:3493:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:3951:(snd_config_expand) Args evaluate error: No such file or directory ALSA lib pcm.c:2102:(snd_pcm_open_noupdate) Unknown PCM hw:1,0 ALSA: Cannot open PCM device alsa_pcm for playback. Falling back to capture-only mode cannot load driver module alsa Segmentation fault ------------------------------- the same command line *as root* works fine. i don't know what has changed.... can someone help me sort this out? many thanks in advance! .pltk.

18 years, 4 months

[linux-audio-user] mjoo.org reachable again

by Leonard "paniq" Ritter

For those who had trouble reaching mjoo.org: the server was not setup correctly and had wrong netmask/broadcast ips. everything should work fine now. -- -- leonard "paniq" ritter -- http://www.mjoo.org -- http://www.paniq.org

18 years, 4 months

[linux-audio-user] Live CD's you can dock

by Esa Linna

Dyne:bolic live CD has a wonderful option, where you can just copy the files of distribution to another partition and add it to LILO - it is called "docking". Extremely handy since you don't have to install it any other way to hard disk, and it's safe too. Too bad that latest beta of Dyne:bolic doesn't recognize my wireless keyboard & mouse. But can you do that (docking) with other live CD's?

18 years, 4 months

[linux-audio-user] snd and AC3

by Brad Fuller

Is there a way that I can play back AC3 files with snd? Or with any audio editor?

18 years, 4 months

[linux-audio-user] Re: [Alsa-user] VxPocket and hotplug - need help getting it working

by Asbjørn Sæbø

(I am cc-ing the linux audio user list, in the hope of broadening the audience and reaching someone able to help me sort this out.) On Tue, Mar 14, 2006 at 12:02:56PM +0100, Asbjørn Sæbø wrote: > I am trying to get a Digigram VxPocket sound card working, and really > need some advice on how to proceed. > [Rest of previous post far below.] In addition to what I have done before (see below), I have now created a /etc/pcmcia/vxpocket.conf according to the description at the bottom of the alsa-project page for the vxpocket card. And I have added the necessary lines to /etc/modutils/alsa-base, and run update-modules. The visible results of this is that * The vx-* modules now seem to be loaded at boot * The card is still not recognized by alsa (it is not listed in /proc/asound/cards, and alsaconf does not find it). * cardinfo no longer says "unsupported card", but "empty". It does however list "IO 0x100-0x10f" and "IRQ 5" (or "IRQ 9d" or "IRQ o"(?)). * "cardctl info" and "cardctl ident" hang when they come to the socket containing the card. * Restarting the pcmcia service gives the following error messages: snegle:~# invoke-rc.d pcmcia restart Shutting down PCMCIA services: /etc/init.d/pcmcia: line 173: kill: (4040) - No such process done. Starting PCMCIA services: cardmgr[4540]: watching 2 sockets cardmgr[4540]: could not adjust resource: IO ports 0x100-0x4ff: Device or resource busy cardmgr[4540]: could not adjust resource: IO ports 0x800-0x8ff: Device or resource busy cardmgr[4540]: could not adjust resource: IO ports 0xc00-0xcff: Device or resource busy cardmgr[4540]: could not adjust resource: memory 0xc0000-0xfffff: Input/output error cardmgr[4540]: could not adjust resource: memory 0xa0000000-0xa0ffffff: Input/output error cardmgr[4540]: could not adjust resource: memory 0x60000000-0x60ffffff: Input/output error cardmgr[4540]: could not adjust resource: IO ports 0xa00-0xaff: Device or resource busy done. I am beginning to suspect that I am up against some pcmcia bug. And I am, at least for now, out of ideas of what to try next to get this card working. Suggestions, advice and tips are very welcome! Asbjørn -------------------------------------------------------------------- > The system is an ASUS L5000-series laptop running DeMuDi 1.2.1. The > kernel is 2.6.12-3-multimedia. > > So far, I have installed the pcmcia-cs package and the hotplug package. > (Do I need both of these? Do they conflict in any way?) > From what I have read of documentation, it seems that with 2.6-kernels, > hotplug is the way to go. Does having the "cardmgr" running interfere > with this? > > I have also downloaded the alsa-firmware corresponding to the alsa > version installed (1.0.9). (DeMuDi does not distribute this firmware.) > I ran "./configure --disable-loader", "make" and "make install". > This resulted in a set of files being placed under > /usr/lib/hotplug/firmware, among them, it seems, files related to the > vxpocket cards. > > The PCCard system itself seems to be working. At boot, a Yenta card bus > bridge is found. And "cardinfo" seems to notice that the card is > present, but only says "unsupported card". > > "alsaconf" does not find the card. Trying to load the snd-vxpocket > module gives no errors, and the module seems to be loaded afterwards > (see below), but the card is still not found by "alsaconf". > > I have tried to run "vxloader" (is that depreceated?), which gives the > message "no VX-compatible cards found". > > Where do I go from here? How do I get the card to be recognized? And > what do I do to get the firmware uploaded to the card? > > > With kind regards > Asbjørn Sæbø > > > > snegle:~# lsmod |grep vx > snegle:~# modprobe snd-vxpocket > Restoring ALSA mixer settings ... done. > snegle:~# lsmod |grep vx > snd_vxpocket 4288 0 > snd_vx_cs 14080 1 snd_vxpocket > snd_vx_lib 36480 1 snd_vx_cs > firmware_class 10624 1 snd_vx_lib > pcmcia 28480 10 snd_vxpocket,snd_vx_cs > pcmcia_core 52628 4 > snd_vx_cs,pcmcia,yenta_socket,rsrc_nonstatic > snd_pcm 96580 4 > snd_vx_lib,snd_intel8x0,snd_ac97_codec,snd_pcm_oss > snd 58404 12 > snd_vx_cs,snd_vx_lib,snd_seq_oss,snd_rawmidi,snd_seq,snd_seq_device,snd_intel8x0,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer > snegle:~#

18 years, 4 months

[linux-audio-user] linux audio interface

by cezar＠mixandgo.ro

Hello list, I'd like to hear some recommendations about buying a 100% linux supported audio board. I own a M-Audio Firewire 410 and I am thinking to sell it cause I cannot use it with linux. I saw a few posts about M-Audio Delta 1010 and (in my opinion) is the best choice but I would like some opinions with the following scenario: 1. Price is not an issue. 2. Don't want additional gear like ADATs, just a working audio interface. 3. I/O ports >= 2 4. Mobility would be nice (for laptop) but not necessary. 5. Minimum 16bit / 44Khz. 6. MIDI is necessary and also lowest latency possible. (which I don't know what it is on linux) Thanks !

18 years, 4 months

[linux-audio-user] homemade music--notated score

by Steve D

Hello all-- Some time ago I mentioned a recording I made, playing one of my recent piano compositions, "Arabesque 1"-- http://www.xscd.com/pub/music/audio/ogg/steve-doonan_arabesque-1.ogg I had begun to work on the notated score of the piece at that time, using the excellent program LilyPond-- http://www.lilypond.org/ --but my work was delayed twice by encountering bugs or issues with the program. The primary developer (Han-Wen Nienhuys) kindly fixed those two bugs (and I donated some money--I enjoy helping to support free software that I use and love to the extent my budget allows) and I was finally able to complete the score. If anyone is interested, or curious to see what the above audio file looks like on paper ;-), it's here: Arabesque 1 A4 paper size http://www.xscd.com/pub/music/scores__notation/pdf/paper_a4/stephen-doonan_… US "letter" paper size http://www.xscd.com/pub/music/scores__notation/pdf/paper_letter/stephen-doo… best wishes all, Steve D -- ---------------------------------------------------------------- How fortunate for governments that the people they administer don't think. -Adolf Hitler ----------------------------------------------------------------

18 years, 4 months

[linux-audio-user] evolution uc-16

by eun.sung＠no-log.org

hi list i try to use an evolution uc-16 midi/usb controller. using the snd-usb-audio module makes my system recognize my box but as i connect its midi output to any appz midi input i can't sned any midi message. i use the alsa drivers compiled as kernel modules. could it be the reason that it can't work? i use Advanced Linux Sound Architecture Driver Version 1.0.10rc3 compiled as 2.6.15.5 kernel modules if anyone could help me thank you greetings

18 years, 4 months

[linux-audio-user] The MySpace terms for content

by Brett McCoy

It looks like (as of May 1), that MySpace is claiming license to redistribute any content on their site, but the license goes away after you remove the content: "By displaying or publishing ("posting") any Content, messages, text, files, images, photos, video, sounds, profiles, works of authorship, or any other materials (collectively, "Content") on or through the Services, you hereby grant to MySpace.com, a non-exclusive, fully-paid and royalty-free, worldwide license (with the right to sublicense through unlimited levels of sublicensees) to use, copy, modify, adapt, translate, publicly perform, publicly display, store, reproduce, transmit, and distribute such Content on and through the Services. This license will terminate at the time you remove such Content from the Services. You represent and warrant that: (i) you own the Content posted by you on or through the Services or otherwise have the right to grant the license set forth in this section, and (ii) the posting of your Content on or through the Services does not violate the privacy rights, publicity rights, copyrights, contract rights or any other rights of any person. You agree to pay for all royalties, fees, and any other monies owing any person by reason of any Content posted by you to or through the Services." Yikes -- Brett McCoy: Programmer by Day, Guitarist by Night http://www.alhazred.com http://www.cassandrasyndrome.com http://www.revelmoon.com

18 years, 4 months

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Linux-audio-user May 2006