Linux-audio-user October 2010

linux-audio-user@lists.linuxaudio.org

116 participants
93 discussions

by Gwenhwyfaer

On 03/10/2010, allcoms <allcoms(a)gmail.com> wrote: > Seeing as we have the ability, we'd like to record and mix @ 96Khz but > my band mates internal laptop sound chipset can't do any better than > 48Khz... Why? If you're using a laptop's internal audio, sound quality is clearly not critical, so why double (triple, if you go to 24/96) your memory requirements and processing demands for, essentially, no reason?

14 years, 9 months

jamin (was: Albums under a label recorded and/or mixed with Linux)

by fons＠kokkinizita.net

On Wed, Sep 29, 2010 at 06:11:36AM -0700, Patrick Shirkey wrote: > Otherwise in the interests of keeping a relatively convivial tone I would > like to thank you for spotting the flaws that you have found. Here's one more: <http://www.kokkinizita.net/linuxaudio/jamin-iir-xover.png> This the frequency response (no EQ or whatever) using the IIR crossover, set to 500 Hz and 3 kHz. Those 'qualitatively more experienced DSP engineers' don't apparently have the experience to perform even the simplest of tests. Nor do they know that the type of filter used will produce antiphase signals at the crossover frequency. (Hint: invert the mid band). Ciao, -- FA There are three of them, and Alleline.

14 years, 9 months

using recordmydesktop

by Rustom Mody

Are there any howtos/wrteups to make recordmydesktop record sound as well as whats on screen? I am on debian squeeze Context: I am using nted to play music from a score. When it plays the note currently played is shown in red. I want to make a 'movie' of this playing-happening. As of now screen is capturing showing playing but no sound thanks Rustom

14 years, 9 months

Audiofire8 and how I chose the wrong motherboard.

by Toby

Short version: Have an Audiofire8, and it works great through FFADO but only with Jack. Jack is cool, but how do I get my normal system sounds (like from Firefox, etc...) out of it? Alsa seems not to be present at all. Did I choose badly? Can I ever get normal ALSA programs to see my Audiofire 8? Thanks, Toby Saga: I ordered a refurb box from Fry's in US. 8 Gig Ram, 1TB Hd, four core AMD Phenom, +extras $600. How could I refuse? Excitedly opening the box upon arrival I noticed that there was no PCI slot on the board whatsoever. So I go to the net. At that time there were only purely consumer type PCI-e sound boards, and I gave up on that. I had good luck with my USB 1.0 Tascam US-122 with linux, so without diligently checking compatibility, I ordered the US-144mkII; I need RCS S/PDIF I/O. A brief search after receiving the unit told me that I was lame, and should be ashamed to call myself a Linux user due to my lack of research before ordering. So I look around, and decide on an Echo again. This time an Audiofire8. I wanted the 4, but found the 8 on Craigslist for $300 flat. Seems I could not pass that up. I had done at least cursory research this time, and was indeed able to get the unit working properly through FFADO, but apparently only through Jackd. That's pretty cool for Ardour, but I can't even get Audacity or alsaplayer to use jack. Plus, how will I ever get Firefox, or other possibly non-jack aware programs to play through jack? I don't seem to have any alsa devices, even though the unit works great with Ardour. I suppose I could just dedicate another mixer blade to the onboard sound card (hear Simpson's shudder: Ughghghghghghhhhhhhhh). I seem to always be chasing rainbows. I remember when Alsa first came out. I thought it looked really neat, but not much used it at first. Then they had OSS emu, etc, but it took a long time for ALSA to win the audio war, and then another long time before it was second nature to me, and everything started to support it, and now, even oss emu seems a thing of the past. /dev/dsp? what's that? Now, with Jack, it seems that I am on another loop of this treadmill. Thanks, Tobiah

14 years, 9 months

Audiofire8 and how I chose the wrong motherboard.

by Harry Van Haaren

Toby, True, only the FFADO can "access" the AudioFire 8. Its a firewire device, and hence ALSA has no intrest in it. Niether does OSS. On the bright side of the rainbow, there are ways to route ALSA / Pulse / OSS / whatever-you-need to JACK. Try google "ALSA program JACK output", in short: you need this article: http://alsa.opensrc.org/index.php/Jack_(plugin)<http://alsa.opensrc.org/index.php/Jack_%28plugin%29> Hth, I've a AudioFire 2 & 12, works no probs on either, so its gotta do on your 8! Cheers, -Harry On Sat, Oct 2, 2010 at 10:16 PM, Toby <toby(a)tobiah.org> wrote: > Short version: > > Have an Audiofire8, and it works great through FFADO but only with > Jack. Jack is cool, but how do I get my normal system > sounds (like from Firefox, etc...) out of it? Alsa seems > not to be present at all. Did I choose badly? Can I ever get > normal ALSA programs to see my Audiofire 8? > > Thanks, > > Toby > > Saga: > > I ordered a refurb box from Fry's in US. 8 Gig Ram, 1TB Hd, > four core AMD Phenom, +extras $600. How could I refuse? > > Excitedly opening the box upon arrival I noticed that there > was no PCI slot on the board whatsoever. > > So I go to the net. At that time there were only purely consumer > type PCI-e sound boards, and I gave up on that. I had good luck > with my USB 1.0 Tascam US-122 with linux, so without diligently > checking compatibility, I ordered the US-144mkII; I need RCS > S/PDIF I/O. > > A brief search after receiving the unit told me that I was lame, > and should be ashamed to call myself a Linux user due to my lack > of research before ordering. > > So I look around, and decide on an Echo again. This time an > Audiofire8. I wanted the 4, but found the 8 on Craigslist > for $300 flat. Seems I could not pass that up. > > I had done at least cursory research this time, and was indeed > able to get the unit working properly through FFADO, but apparently > only through Jackd. That's pretty cool for Ardour, but I can't even > get Audacity or alsaplayer to use jack. Plus, how will I ever get > Firefox, or other possibly non-jack aware programs to play > through jack? I don't seem to have any alsa devices, even though > the unit works great with Ardour. > > I suppose I could just dedicate another mixer blade to the onboard > sound card (hear Simpson's shudder: Ughghghghghghhhhhhhhh). > > I seem to always be chasing rainbows. I remember when Alsa first > came out. I thought it looked really neat, but not much used it > at first. Then they had OSS emu, etc, but it took a long time for > ALSA to win the audio war, and then another long time before it > was second nature to me, and everything started to support it, and > now, even oss emu seems a thing of the past. /dev/dsp? what's that? > > Now, with Jack, it seems that I am on another loop of this treadmill. > > Thanks, > > Tobiah > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user(a)lists.linuxaudio.org > http://lists.linuxaudio.org/listinfo/linux-audio-user >

14 years, 9 months

Re: [LAU] Audiofire8 and how I chose the wrong motherboard

by alex stone

Toby, there is an option for you here. Install the alsa-jack plugin, and add the neccessary text to your .asoundrc. This will route all alsa based sound through jack. http://alsa.opensrc.org/index.php/Jack_%28plugin%29 If that link doesn't work for you, then go to the unofficial wiki on the alsa main page, and search for the jack plugin. You'll also see the syntax for your .asoundrc on the jack plugin page. http://alsa.opensrc.org/index.php/ALSA_plugins Basically, you install the plugin, then add something like this to the .asoundrc: pcm.!default { type plug slave { pcm "jack" } } pcm.jack { type jack playback_ports { 0 alsa_pcm:playback_1 1 alsa_pcm:playback_2 } capture_ports { 0 alsa_pcm:capture_1 1 alsa_pcm:capture_2 } } ctl.mixer0 { type hw card 0 } ..................................... This works fine for me using gentoo 64bit RT. In addition, if you want any flash (blech) playback through jack, then you can add libflashsupportjack, which i guess is in most distro repos. It's in Gentoo, anyway. I stress here i've only tested this with 64bit. I've gone a bit commando with linux, and use lynx and mutt these days, but i do crank up firefox occasionally, and all the audio works fine through jack. I'm sure much wiser linux minds than mine will enthusiastically step in if i've given you wrong info here. Good luck, Alex. -- www.openoctave.org midi-subscribe(a)openoctave.org development-subscribe(a)openoctave.org

14 years, 9 months

extracting files from a cd

by Michael Weaver

Hi! my name is Michael and I am a newby to this list as someone on the Orca list pointed me in the direction of this list as regarding a question I have. I am running Ubuntu Lucid and was using Audio CD extractor for extracting tracks from CDs. I have one CD of a 2 disc set where only the first 10 tracks on the second CD only want to be extracted to my music folder. When I look at the check boxes in Audio CD Extractor I see all of the check boxes checked apart from track 11 which doesn't appear at all. I use the Orca screenreader and when I read the table with the arrow keys I have track 1 check box checked, track 2 check box checked right up to track 10, it doesn't say any status for track 11 and the next box appears as track 12 and that is checked down to track 19 which is the list track on that CD. I notice that I get a message about the album not being recognised by Music Brains or something and possibly asked if I want to submit the album for adding to the database so I am wondering if this is the reason while only the first 10 tracks are converted and sent to my music folder so I don't get the whole of that CD when I copy the contents to my Plextalk player.

14 years, 9 months

Re: [LAU] Migrating to Linux - need help

by Robin Gareus

Hi again, I think you fell for "reply to munging": you did reply only to me instead of the list. I've CCed it on this reply. I'm not using Ubuntu but here are few hints that may apply to it as well: * run 'gstreamer-properties' from a console (it might be available from the gnome-menu as well) to configure the default desktop-audio device. You need to install 'gstreamer-jack' (maybe called 'gstreamer-plugins-bad') package. After starting JACK, Music Playback (rhythmbox, totem, etc) should now go to your Delta Audiophile. mplayer can be configured to use JACK by default with a ~/.mplayer/config * There are some tricks to pipe ALSA applications' audio through JACK: A) http://www.alsa-project.org/main/index.php/Asoundrc#JACK_plugin does not reliably work with all ALSA applications, but gives sound to skype and flash and it is easy to set up. or B) http://alsa.opensrc.org/index.php/Jack_and_Loopback_device_as_Alsa-to-Jack_… works very well, but is [still] tricky to setup up and consumes a bit more CPU. Using one of those options, it is certainly possible to also configure Orca to go via JACK, but I see a few problems which may not easily solved by a GNU/Linux Newbie, mostly related to the auto-start procedure during boot: first JACK, (then possibly alsa_in/out for (B) and finally Orca's speech-system. I suggest you start a new thread on the list "Orca Speech Dispatcher and JACK" - other's may have solved this issue. Even though you said you want to do _everything_ with the Delta card, I suggest to re-evaluate that idea for the following reasons: - simplicity and robustness of setup (also during updates) - volume-control: you may want to have different levels for the speech-system and music-production. - no-interference when multi-tasking: I'd be annoyed when quickly reading mail in the middle of a music-production a speech dispatcher pipes into my JACK session and blasts out trough the monitor speakers. just my 2c, robin On 10/01/10 20:14, Edu Camargo wrote: > Guys, > > All I have to say is thank you for all the feedback. I really should be > done a lot of questions in a split form, but I got so anxious about the > new perspective that Linux seems to bring in a few moments that I > wrapped all at once. > > In fact I went in favor of plain Ubuntu because I couldn't figure out a > way to have screen reader assistance during the Ubuntu Studio instalation. > > Actually removing pulseaudio did the trick although I lose some aspects > of the Ubuntu, E.G. sound preferences. But I remember that there should > be a way to use this particular applet without the pulse's presence. I > just can't remember where I found information on how to apply this "patch". > > But Robin pointed me a thing that might make me investigate a bit more, > because my idea was to live only with the Delta, for any purpose, > including listening to music, which of course I prefer doing with Delta, > with my beloved MDR7506 plugged on my console or a pair of Yamaha > monitor speakers. The Speech Dispatcher, (a speech system that is used > by Orca), supports only ALSA, OSS, NAS and pulse for sound output. By > the way, ALSA is recommended by the Speech Dispatcher configuration. > Needless to say that Speech Dispatcher opperates faster with ALSA than > with pulse. Since Jack requires exclusive access to the device, > something tells me that I'll have to use Orca and many other > applications via the on-board sound and use the Audiophile only for > production purposes, right? > > As mentioned, I really wanted to stick fully with the Delta, but if this > ain't possible, what should I configure to make ALSA use the on-board > audio and leave room for Jack in the Audiophile? (I hope I have a way > around because I wouldn't love to sacrifice audio quality on my dayly > computer usage). > > But thanks so much for all the feedback. This is what makes the > diference. The Linux world is really new to me, and I am glad to learn > that there are always people looking forward to offer alternatives that > oppose to expensive and proprietary means of production. I hope to have > a great story to tell to the world. > > And Robin, no problem. Of course top-posting facilitates reading > because you just move the cursor and reads the answer without scrolling, > but this ain't a problem to me. In-line reply doesn't bother me. It > helps to keep threads comprehensive for people who might have lost the > course of the road for a reason. > > Peace and music, > > > Edu Camargo. > > > -------------------------------- > > On 30-09-2010 08:17, Robin Gareus wrote: >> Hi Edu, >> >> I did not know that there's gtk graphical support for screen-readers >> these days. and that thay're good enough to even work wit complex >> applications such as ardour. Wow, That's amazing. >> >> If you like the console: >> http://ltsb.sourceforge.net/ is a "guide is inteded for blind, tuxish >> musicians and all others, who simply like the console." It may be a bit >> outdated though. >> >> As for your sound-issue: It _may_ be pulseaudio blocking the card. >> Edit /etc/pulse/client.conf or $HOME/.pules/client.conf and set >> autospawn = no >> and simply stick to use JACK. >> >> jackd requires exclusive access to the soundcard. So if the system is >> playing sound (I guess your voice-speak accessibility system) JACK can >> not use that card. >> >> If the text-to-voice application supports JACK you could launch jackd >> before that, but you're probably better off using the built-in soundcard >> for that and use jack only for for audio-engineering. >> >> It looks like your main problem boils down to wrong numbering of the >> sound-cards. This has been a long standing issue on Linux and there are >> a few ways around it: >> >> 1) If the numbering is consistent on each boot: you can simply not care >> about the number and configure all audio-software to use whatever ID. >> >> 2) the "modern way" using udev: http://alsa.opensrc.org/index.php/Udev >> >> 3) the "old way" using module load options: >> >> http://www.mail-archive.com/alsa-user@lists.sourceforge.net/msg07809.html >> >> >> It may also help to split up your many questions into several emails to >> get better answers. eg. sound-card numbering, jackd startup from the >> console, and last but not least: recommended applications for whatever >> audio task you're up to. >> >> You may also find a lot of answers to those already via google or the >> archive of this list. >> >> best, >> robin >> >> PS. As far as I know, you are not the only Linux-Audio-User on this list >> who needs to rely on a screen-reader. Others may be on holiday or are >> just busy. >> >> PPS. I have top-posted because I assumed that's easier for both >> screen-readers and text-to-speech synths. >> The preferred method on this list is to use inline-replys or >> bottom-posting. I've wondered a few times if this is a problem with >> accessibility in general. Care to enlighten me? >> >> >> On 09/28/10 18:38, Edu Camargo wrote: >> >>> Hello guys, peace and music to all of you. >>> >>> Here's my story: >>> >>> I won a laptop some months ago, and with the Windows 7's arrival I >>> decided to try a Linux distro, more precisely Ubuntu, for its facility >>> and also, for the Gnome's accessibility from the CD boot to the final >>> instalation, which is an enormous advantage for us blind users, when we >>> want to setup a computer independently. I use computer for ten years and >>> it's good to see Linux and Apple's developers going towards facilities >>> to everybody... I've mentioned Apple because seems that Apple's >>> Voiceover can also be accessed even during the instalation according to >>> an article I've read on the web. >>> >>> Anyway, I've tested Ubuntu 9.10 and it wasn't that good because it had >>> some audio issues including with the Orca's usage, so I decided to wait, >>> and soon came Ubuntu 10.04 and, for the moment, it took all the chances >>> of Windows getting wrapped into my laptop. Besides, with a few, very few >>> programs I can do all the things I need to do... Of course things may >>> change in the future, but it's good to work in a system so light, >>> secure, and it's even better to find a supportive comunity. >>> >>> Last saturday I decided to move my desktop computer, an Athlon X2 4000, >>> Asus M2N-SLI, 2GB of RAM with two hard disks, to Ubuntu 10.04.1 64bits >>> version. I really got amazed with the performance, even the Orca screen >>> reader is more responsive with the 64bits version. I'm interested in >>> audio production using Linux, so I need clues. >>> >>> I have two audio cards, the mother board's built-in and the Delta >>> Audiophile 2496, the ladder one detected as card 0, wich according to my >>> understanding is the default card. But I was unable to get output from >>> the Delta, so I had to select the built-in sound card as my default >>> output for the moment. Then, after further reading I could install jackd >>> and Ardour for a test, and with Ardour I get all the feedback I need >>> while playing sounds through Delta. But of course, my goall is to make >>> the system work fully with the Delta. >>> >>> What should I do to build a stable audio set using Ubuntu? And of >>> course, what are the must have programs? Since Orca is GTK-based, I'd >>> prefer to stay far from KDE due to accessibility issues. The thing I've >>> loved about Ardour is that I'm able to control jack without having to >>> access the jack GUI, which is KDE. But of course, if I can adjust >>> settings by editing configuration files it'll be better. >>> >>> Any tips on how to make things work decently will be very appreciated. >>> >>> Sorry for some obvious questions that I might have asked, and sorry for >>> the book. >>> >>> Thanks in advance for all the input. >>> >>> Warm regards from São Paulo, Brazil. >>> >>> Edu Camargo. >>> >>> >>> _______________________________________________ >>> Linux-audio-user mailing list >>> Linux-audio-user(a)lists.linuxaudio.org >>> http://lists.linuxaudio.org/listinfo/linux-audio-user >>> >

14 years, 9 months

Migrating to Linux - need help

by Edu Camargo

Hello guys, peace and music to all of you. Here's my story: I won a laptop some months ago, and with the Windows 7's arrival I decided to try a Linux distro, more precisely Ubuntu, for its facility and also, for the Gnome's accessibility from the CD boot to the final instalation, which is an enormous advantage for us blind users, when we want to setup a computer independently. I use computer for ten years and it's good to see Linux and Apple's developers going towards facilities to everybody... I've mentioned Apple because seems that Apple's Voiceover can also be accessed even during the instalation according to an article I've read on the web. Anyway, I've tested Ubuntu 9.10 and it wasn't that good because it had some audio issues including with the Orca's usage, so I decided to wait, and soon came Ubuntu 10.04 and, for the moment, it took all the chances of Windows getting wrapped into my laptop. Besides, with a few, very few programs I can do all the things I need to do... Of course things may change in the future, but it's good to work in a system so light, secure, and it's even better to find a supportive comunity. Last saturday I decided to move my desktop computer, an Athlon X2 4000, Asus M2N-SLI, 2GB of RAM with two hard disks, to Ubuntu 10.04.1 64bits version. I really got amazed with the performance, even the Orca screen reader is more responsive with the 64bits version. I'm interested in audio production using Linux, so I need clues. I have two audio cards, the mother board's built-in and the Delta Audiophile 2496, the ladder one detected as card 0, wich according to my understanding is the default card. But I was unable to get output from the Delta, so I had to select the built-in sound card as my default output for the moment. Then, after further reading I could install jackd and Ardour for a test, and with Ardour I get all the feedback I need while playing sounds through Delta. But of course, my goall is to make the system work fully with the Delta. What should I do to build a stable audio set using Ubuntu? And of course, what are the must have programs? Since Orca is GTK-based, I'd prefer to stay far from KDE due to accessibility issues. The thing I've loved about Ardour is that I'm able to control jack without having to access the jack GUI, which is KDE. But of course, if I can adjust settings by editing configuration files it'll be better. Any tips on how to make things work decently will be very appreciated. Sorry for some obvious questions that I might have asked, and sorry for the book. Thanks in advance for all the input. Warm regards from São Paulo, Brazil. Edu Camargo.

14 years, 9 months

[ANN] Linux Audio Conference 2011

by Robin Gareus

sorry for x-posting. Dear Linux Audio developer, user, composer, musician, philosopher and anyone else interested, you are invited to the... Linux Audio Conference 2011 The Open Source Music and Audio Software Conference May 6-8 2011 Music Department, National University of Ireland, Maynooth Maynooth, Co.Kildare, Ireland http://music.nuim.ie As in previous years, we will have a full programme of talks, workshops and music. Two calls will be issued, a Call for Papers (see below) and Call for Music (soon to be announced). Further information will be found in the LAC2011 website (under construction). ================ CALL FOR PAPERS ================= Papers on the following categories (but not limited to them) are now invited for submission: * Ambisonics * Education * Live performance * Audio Hardware Support * Signal Processing * Music Composition * Audio Languages * Sound Synthesis * Audio Plugins * MIDI * Music Production * Linux Kernel * Physical Computing * Interface Design * Linux Distributions * Networked Audio * Video * Games * Media Art * Licensing We very much welcome practical papers resp. software demos ("how I use Linux Audio applications to create my music/media art"). Paper length: 4-8 pages, with abstract (50-100 words) and up to 5 keywords. Language: English. The copyright of the paper remains with the author, but we reserve the right to create printed proceedings from all submitted (and accepted) papers. IMPORTANT DATES: Submission deadline: 15/January 2011 Notification of acceptance: 7/March 2011 Camera-ready papers: 1/April 2011 Queries: Victor Lazzarini, NUI Maynnooth (victor.lazzarini(a)nuim.ie)

14 years, 9 months

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Linux-audio-user October 2010