Linux-audio-user November 2005

linux-audio-user@lists.linuxaudio.org

147 participants
156 discussions

by conrad berhörster

Hello Lists, I don't know, where ich can fix my little problem. Maybe i 've missed some explanations and/or haven't read my mails good enough. anyway, i try to install a linuxbox for audio on slackware i have installed slackware and patching the kernel 2.6.14 vanilla with patch-2.6.14-rt2. Then i installed the set_rtlimits1.1.0 software, because Slackware has no PAM. First. this must be all for audio in realtime , is this right?? then i have to set the setuid. aus root i have done bash-3.00$ su Password: bash-3.00# chmod ugo+s /usr/local/bin/jackd bash-3.00# exit bash-3.00$ ls -la /usr/local/bin/jackd -rwsr-sr-x 1 root root 206476 2005-11-01 15:23 /usr/local/bin/jackd bash-3.00$ whoami soundroom bash-3.00$ jackd -dalsa& [1] 3202 bash-3.00$ 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 .. creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit control device hw:0 configuring for 48000Hz, period = 1024 frames, buffer = 2 periods nperiods = 2 for capture nperiods = 2 for playback bash-3.00$ ps -aux [..] root 3202 0.0 0.4 10472 2380 pts/1 S 12:03 0:00 jackd -dalsa root 3203 0.0 0.4 10472 2380 pts/1 R 12:03 0:00 jackd -dalsa root 3204 0.0 0.4 10472 2380 pts/1 S 12:03 0:00 jackd -dalsa root 3205 0.0 0.4 10472 2380 pts/1 S 12:03 0:00 jackd -dalsa root 3206 0.2 0.4 10472 2380 pts/1 S 12:03 0:00 jackd -dalsa [..] bash-3.00$ jack_lsp JACK server not running why i can't use jack an normal user? what have i missed? why there are 5 processes of jack? is this a secure way? do i need every application as suid?

19 years

[linux-audio-user] [OT?] Sound card hardware buffers and other questions

by John Anderson

Hi everyone First question: I'm trying to get my head around how sound cards work. My Terratec, for instance, has several IO ports. Are there buffers on the card itself "behind" those IO ports? If so, how big would they be? Second question: I've noticed that with jackd, the lower the period size, the more interrupts per second there are from the sound card. This is because smaller buffers need to be cleared out more often, right? So how many interrupts per second would be "too many"? Obviously this isn't a fixed number but would depend on CPU speed, system load etc etc. How does one go about finding a good balance between interrupts / second and throughput? Would alsa-devel be a better forum to ask these questions? thanks John

19 years

[linux-audio-user] Only two controls in on usb alsa mixer device

by Alex Polite

I connected my new SB Live External USB to my GNU/Debian Sid box and it "just worked". The only thing that doesn't work is the mixer. In alsamixer only get I one control (PCM). If I start alsa with the -V a option I get two controls (PCM and PCM Capt). So for recording I have no means of setting which source to record from. Beofore I supply you with more detailed diagnostics I just wanted to ask if there are any usual suspects for this problem. alex -- Alex Polite http://flosspick.org - finding the right open source

19 years

[linux-audio-user] Funny music

by james＠dis-dot-dat.net

http://blog.dis-dot-dat.net/2005/11/not-taking-things-seriously.html Feel free to laugh at this - I did. It's a bit different for me. It has real guitars, for a start. Comments are, as always, craved and waited for with bated breath. James -- "I'd crawl over an acre of 'Visual This++' and 'Integrated Development That' to get to gcc, Emacs, and gdb. Thank you." (By Vance Petree, Virginia Power)

19 years

[linux-audio-user] re: miscellaneous questions (non-GUI editor)

by Bill Schottstaedt

> Now to the software question: does there exist any sound editor with a > non-graphical interface, i.e., one that can be operated from the Linux console > for inserting, deleting, copying and otherwise editing audio? Snd. Use the --with-no-gui configuration switch.

19 years

[linux-audio-user] Linux Audio Conference #4 (LAC2006): Call for Papers/Music etc

by Frank Neumann

Dear all, this should have come one month earlier, but such is life..anyway: This mail is to announce the calls for papers/music/etc for the 4th International Linux Audio Conference (LAC2006). See http://lac.zkm.de/2006 for more information. LAC2006 will take place 27-30 April 2006, again at the ZKM | Institute for Music and Acoustics in Karlsruhe, Germany. We have tried to simplify things a little bit since LAC2005. There are calls for papers, demos, workshops, and music. The former category BOFS has been merged with the workshops. There is no call for project notes anymore; instead we have the call for demos now. The call for posters has been discarded. We hope everybody agrees that this is an improvement and we are looking forward to many interesting submissions for LAC2006! Please feel free to forward this email to anybody who is interested. Thank you for reading! Frank Neumann and Goetz Dipper *********************************************************************** Call for Papers We invite submissions of papers addressing all areas of audio processing based on Linux and open source software. Papers can focus on technical, artistic or scientific issues and can target developers or users. This includes (but is not limited to) the following categories: * Computer Music * Music Production * Instruments * Drivers and Sound Architecture * Audio Distributions * Generic (Usage, Documentation etc.) The conference is held in english, so all papers and presentations will have to be done in english, too. Length of a paper is 4-8 pages. Papers have to include an abstract (50-100 words). The abstract will be published separately on the conference website once the paper has been accepted. Also, papers should include up to 5 keywords. In general talks should take 20-30 minutes followed by 5 minutes discussion. Please notify us if you need a special technical setup. The technical standard setup will be: * microphone (head set) * projector with XVGA input (resolution 1024x768) * stereo speaker setup with mini jack input If you are not able to bring your laptop along with you, please notify us in advance. How to submit * File format is PDF, formatted for A4 paper. Make use of the templates for paper formatting available at: http://lac.zkm.de/2006/downloads.shtml * See our check list to ensure that you do not forget to enclose all necessary information: http://lac.zkm.de/2006/submission_instructions.shtml * Send your paper and all necessary information by 8 Jan 2006 via email to this address: lac2006 at zkm dot de * You will be notified by 19 Feb 2006 whether your paper has been accepted. The reviewers may ask you to modify your paper in order to be accepted. The deadline for the final version is March 12, 2006. Important Dates 08 Jan 2006: Paper submission deadline 19 Feb 2006: Notification of acceptance 12 Mar 2006: Final version deadline 27 - 30 Apr 2006: Conference *********************************************************************** Call for Demos This is the only new category of LAC2006. You do not need to write a whole paper, but rather a short abstract only (50-100 words). This category is mainly thought for software demos. Be aware though that in case of too many submissions papers take priority over demos. See section "Call for Papers" for info on the duration of talks and the technical setup. How to submit * See our check list to ensure that you do not forget to enclose all necessary information: http://lac.zkm.de/2006/submission_instructions.shtml * Send your abstract and all necessary information by 8 Jan 2006 via email to this address: lac2006 at zkm dot de * You will be notified by 19 Feb 2006 whether your submission has been accepted. Deadline for submissions is 08 Jan 2006. *********************************************************************** Call for Workshops With respect to their content workshops do not differ from talks: Workshops can have technical focus as well as artistic or scientific focus. Workshops can be targeted to developers as well as users. See section "Call for Papers" for more info on this. The shape of the workshop is completely up to you. E.g. it can be tutorial-like ("how to write an ALSA driver/ a jack application/ a LADSPA plugin/ etc.") or it can be BOFS-like (e.g. a meeting of like-minded users and/or developers to exchange experience and knowledge about a specific topic), or it can be anything in between. Workshops can take place in seminar rooms or in a public space like the ZKM cafe. Depending on the location, attendance might be limited to ca 10 people. There is no deadline for submitting workshops. However, we strongly encourage you to submit early. It will be more likely to get a free slot and it will be easier for attendants to know about the workshop if it is published on the conference website. If you expect the attendants to prepare their laptops for your workshop (e.g. by installing some software) or if there are other requirements, please note so in your abstract. How to submit * See our check list to ensure that you do not forget to enclose all necessary information. http://lac.zkm.de/2006/submission_instructions.shtml * Send an abstract (ca. 50-100 words) and all necessary information via email to this address: lac2006 at zkm dot de * The abstract will be published on the conference website once the workshop has been accepted (not before 27 Feb 2006 though). *********************************************************************** Call for Music There will be some concerts during the conference. We are looking for music that has been produced completely or mostly under Linux and/or with open source software: * "Serious" compositions, to be played in a concert-like context * Electronica, Chill-Out, Ambient etc., to be played in a less formal, "party-like" context. Additionally you are welcome to give a talk about your piece. We encourage you especially to show how you made the piece using open source software. Please send a short abstract (ca. 50-100 words) if you want to give a talk. If you want to participate, send your composition(s) to this address: LAC2006 - Call for Music ZKM | Institut fuer Musik und Akustik Lorenzstr. 19 D-76135 Karlsruhe Germany Make use of one of the following media formats: * Media: Audio-CD, DVD or CD-ROM * File formats: aiff or wav * Channels: mono, stereo or multi-channel * Samplerate: 44.1, 48, or 96 kHz * Resolution: 16 or 24 bit Include the following items with your submission (in English): * Requirements (speaker setup, instruments etc.) * A filled-out and signed printout of the form available here: http://lac.zkm.de/2006/downloads.shtml For the printed programme and to be published online and on the conference CD, in continuous text (no table or list please): * A short commentary on the composition(s) (each ca. 150 words) * A short Curriculum Vitae (ca. 100 words) Deadline for submissions is 08 Jan 2006. A jury will select the compositions that will be performed/played. Furthermore, the jury will give out three prices to participants to contribute to their travel expenses. Besides artistic criteria and technical reasons, these criteria apply for the selection: * Tape pieces or pieces which are performed by the composer herself will generally have more chances to get included. * If we get more pieces than we can include in the programme, composers who are attending the conference are preferred. Terms and conditions for participation can be found in the form mentioned above. This form includes among other things: * I will receive no fees whether my composition is played or not. * GEMA fees (in case of performance) will be paid by ZKM. * The material I send to ZKM will not be returned. Additionally to this Call for Music, there will be an open stage called "Plug & Chill - The Linux Jam Night" at Saturday night (29 Apr 2006), where attendents of the conference are invited to perform their pieces in a less "official" context. There is no deadline for this, so people can decide during the conference if they want to participate. However if you already know that you want to participate do not hesitate to inform us. Send us an email to lac2006 at zkm dot de and include a description of your equipment and a short characterisation of your music (keywords only). During the conference it is possible to register at the info desk. Note that there is a time limit for "Plug & Chill". If we have received too many registrations already you might not get a slot. Contributions to "Plug & Chill" should not exceed 10 min. There will be a room at ZKM where people can meet during the conference and rehearse for "Plug & Chill". ***********************************************************************

19 years

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Linux-audio-user November 2005