Linux-audio-dev

linux-audio-dev@lists.linuxaudio.org

3 participants
7520 discussions

by Alfons Adriaensen

I've gone through the docs a number of times, but can't find a way to read / write the channelmask and guid in a WAVEFORMAT extensible file. Is it possible ? -- FA Follie! Follie! Delirio vano e' questo!

19 years, 8 months

[linux-audio-dev] realtime low lat and 2.6.16

by Richard Smith

Whats the recommended realtime low lat setup for 2.6.16? All the docs I read seem to be for much older kernels? Does realtime-lsm still work? I've got a m-audio audiophile 24/96 and I want jackd to run without xruns. I tried the rt16 patches for 2.6.16 but my kernel just hangs on boot. -- Richard A. Smith

19 years, 8 months

[linux-audio-dev] multiface latency question

by Dmitry Baikov

Hello! I'm planning to get RME Multiface (II) and have a question to it's owners. Can you, please, post its latency in audio loop, measured with jaaa in 2x64 buffer setup. Thank you. Regards, Dmitry. P.S. crossposted from LAU, since there were no responces.

19 years, 8 months

Re: [linux-audio-user] Re: [linux-audio-dev] music engine

by Kjetil Svalastog Matheussen

Paul Davis: >> As an interface designer, the first thing I look for on an engine's >> project site is some sort of asynchronous API - I should never concern >> myself with anything outside referencing the api from my app's one >> windowing thread. FMOD, gstreamer, and my dead pkaudio project do this >> very well. I don't ever want to worry about what thread it happens in, >> what threads it will affect, or what the performance effects of >> *making* the call will be (as opposed to residual effects). > >although i agree that this is the right design for many classes of >application design, i would like to see how you propose to tackle >metering and waveform display (the two most difficult examples). >ardour would be relatively easy to separate into interface+engine >processes (as opposed to just a lib/lib-client separation) if it were >not for these issues. moving waveform and metering data back and forth >between two processes via a wire protocol is very expensive and >inefficient. How about creating the gfx waveform data on the engine and then just send a pointer to the gfx process, which displays the data using the MIT-SHM X extension? PS. Please don't let this inspire you to reimplement Ardour. :-)

19 years, 8 months

[linux-audio-dev] Please help: 16-channel recording w/ LAYLA, ALSA, JACK, ARDOUR

by Lance Blisters

I bought a Layla24 and Cardbus adaptor. Works beatifully with ALSA/JACK/ARDOUR up to 8 channels. However, the soundcard presents the 8 analog channels as device 0 and 8 digital channels as device 1. JACK will only open one device at a time. So in order to record and play back 16 channels with Ardour, I apparently need to create a virtual ALSA device combining the two LAYLA subdevices. Which brings me back to a place I always find myself when working with new sound gear - ALSA LIMBO, a dark claustrophobic space occupied only by unidentified .asoundrc fragments, paved with device anomolies, mined with disinformation bomblets, seen through the funhouse mirrors of fruitless google sessions. Cascades of similar plugin types of indeterminate direction, each encased in the next like a 12-step turducken, translated through an inconsistent mix of multiple (equivalent?) syntaxes, with the smallest deviation producing a cryptic failure. A breadcrumb trail of trials and errors spirals back further than I can see, and the only sounds I can hear over the queasy rumblings building in my stomach, is me repeating to myself that OF COURSE it is possible, I can't be the ONLY person to try to use all channels with JACK, and if I just dig through another 10 pages of search results i'll surely find a .asoundrc which solves the whole thing for me. And then I wake, throat hoarse, sticky with fever sweat, to apply ice to my forehead and plaster to the fresh hole in my wall. And I beg of you, someone, please, for the love of all that is holy, just give me the damn answer so i can get on with my life. And not a "use the multi plugin" answer, because THAT IS NO ANSWER, THAT IS ONLY A TAUNT. An actual, complete .asoundrc which has actually worked in practice, with .ctl, mmap, exclusivity, #channels, etc accounted for. The kind which saves me literal hours of very literal frustration. Thanks in advance, -geoff

19 years, 8 months

[linux-audio-dev] [ANN] GNU Denemo 0.75

by Adam Tee

GNU Denemo, a GTK+ front-end to GNU Lilypond Major changes include: Moved back to Plain C for future releases Reimplementation of keymaps so they are now XML based Midi import Lilypond Export Updates Reimplementation of rc files so that they are now XML Removal of Blank rest modes Crash Recovery Lots of memory leak fixes Help Manual now available Revised CSound export Revised Print functionality Blank notes are now displayed in Yellow to aid in viewing the score Keybindings for inserting Time Signatures, Key Signatures and Clefs Adam Maintainer GNU Denemo http://denemo.sourceforge.net

19 years, 8 months

[linux-audio-dev] [ot] How do GUI-libs notify the program of changes?

by Julien Claassen

Hi all! I know it's completely OT, but I think there maybe people here, who could help me. Problem is: I'm still on my libcui (character user interface) project and I wonder: I push a button, slide a slider... How does the UI notify the program of this change? How do Engine and UI communicate? Please anyone: HELP ME! Kindest regards Julien -------- Music was my first love and it will be my last (John Miles) ======== FIND MY WEB-PROJECT AT: ======== http://ltsb.sourceforge.net - the Linux TextBased Studio guide

19 years, 8 months

[linux-audio-dev] Measuring playback and capture quality.

by James Courtier-Dutton

Hi, Are there any linux tools out there that will sample the line in, and display a detailed spectrum scope of the detected sound? E.g. http://www.pcavtech.com/soundcards/ct462048/SNR_LB_FS.gif Eventually I wish to send a test signal from one sound card to another and compare the frequency response/noise etc. of the line input of the card. James

19 years, 8 months

[linux-audio-dev] Linux Audio Wiki on port 2500 no more

by Hans Fugal

The wiki that was at http://fugal.net:2500 is no longer there. It now has its own subdomain: http://lawiki.fugal.net I would be perfectly happy to entertain a more dedicated domain name, or more appropriate subdomain of an existing domain, if someone wants to foot the bill. If I can figure out how in a short amount of time, I'll put up a redirect at the old address. -- Hans Fugal ; http://hans.fugal.net There's nothing remarkable about it. All one has to do is hit the right keys at the right time and the instrument plays itself. -- Johann Sebastian Bach

19 years, 8 months

[linux-audio-dev] [ANN] netjack-0.11rc5

by torbenh＠gmx.de

netjack-0.11rc5 Some pieces of Code which can deliver you the full jackd experience with multiple Computers. Links JackPorts via generic IP networks. The alsa_in and alsa_out client can connect jackd to an unrelated alsa Soundcard. And their algorithm has been improved. Also downsampling and bitrate reduction is included now, to make it work on low bitrate links. Tested over the Internet some times now, with moderate success. Also compiles on OSX... with-alsa=0 -- torben Hohn http://galan.sourceforge.net -- The graphical Audio language

19 years, 8 months

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Linux-audio-dev