Linux-audio-dev

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7516 discussions

[linux-audio-dev] question about a c++ error

by Dave Phillips

Greetings: This is perhaps a bit OT (or more than a bit). I'm eager to work with a new macro for Open Office that inserts LilyPond-encoded music fragments into an OOo document, but I've hit an unusual snag. The macro is installed correctly, but when I try to use it I receive this error: terminate called after throwing an instance of 'std::logic_error' what():basic_string::_S_construct NULL not valid It almost looks poetic. :) Alas, Google wasn't much help, and the author of the macro has no idea why this error results (his code contains no C++). Can any C++ guru here shed any light on the how/what/why of the error ? Maybe even suggest a fix ? LilyPond 2.8.4, OOo 2.03, and I'll be happy to supply any other needed information. And yes, the error has been posted on the LP dev list. Best, dp

19 years

Re: [linux-audio-dev] question about a c++ error

by Taybin Rutkin

Just a guess, but it looks like at some point it is trying to create a NULL string, which isn't allowed (apparently). I'm not sure if this is helpful or obvious to you. Taybin -----Original Message----- >From: Dave Phillips <dlphillips(a)woh.rr.com> >Sent: Oct 11, 2006 6:05 PM >To: LAD Mail List <linux-audio-dev(a)music.columbia.edu> >Subject: [linux-audio-dev] question about a c++ error > >Greetings: > >This is perhaps a bit OT (or more than a bit). I'm eager to work with a >new macro for Open Office that inserts LilyPond-encoded music fragments >into an OOo document, but I've hit an unusual snag. The macro is >installed correctly, but when I try to use it I receive this error: > >terminate called after throwing an instance of >'std::logic_error' >what():basic_string::_S_construct > NULL not valid > >It almost looks poetic. :) > >Alas, Google wasn't much help, and the author of the macro has no idea >why this error results (his code contains no C++). Can any C++ guru here >shed any light on the how/what/why of the error ? Maybe even suggest a >fix ? > >LilyPond 2.8.4, OOo 2.03, and I'll be happy to supply any other needed >information. > >And yes, the error has been posted on the LP dev list. > >Best, > >dp >

19 years

[linux-audio-dev] Linuxaudio.org seeking volunteer help

by Ivica Ico Bukvic

October 7, 2006 -- Linuxaudio.org announces new staff openings If applicable, please forward to your respective mailing lists. FOR IMMEDIATE RELEASE: With increasing membership and expanding services, Linuxaudio.org is experiencing growing pains. As a result, the existing staff is overwhelmed with day-to-day operations, which is making overseeing long-term strategic goals, increasingly difficult. For this reason, we would like to invite LAU/LAD members, to consider joining our staff in order to help keep up with the daily activities. Committing to Linuxaudio.org has never been easier as the service term for these is very flexible: once you commit to any of the duties stated below, you will be able to back out at any time (obviously advance notice will be very much appreciated). Please note that these are currently volunteer positions (something that may change in the future, but one should probably not apply for these in hopes that this will happen anytime soon). The benefits include: 1) free membership 2) credit where credit is due 3) references/letters of support 4) PR for your work and your project (if applicable) 5) recognition within the Linuxaudio.org, Linux audio community, and beyond Please see the list of vacancies below: 1) Linuxaudio.org Webmaster (1 position) Duties: Update content, monitor consortium mailing lists for new updates, actively participate in the management discussions/meetings. Prerequisites: fluent English, active member of the Linux audio community. 2) Docs.linuxaudio.org creator/Webmaster (2-4 positions) Duties: Design a template for the documentation project (i.e. Wiki), solicit and format documentation submitted by others, write documentation for software projects while maintaining unified framework (i.e. similar to ALSA soundcard Matrix install how-to), participate in the consortium mailing list. Prerequisites: solid English writing skills, active member of the Linux audio community, familiarity with HTML/CSS, optimized Web graphics editing/creating skills preferred (i.e. Gimp). 3) Project Updates and Press Release Summary Writer (2 positions) Duties: Solicit new updates from members using consortium mailing list, forward monthly summary to the Linuxaudio.org Webmaster for online posting, compile Press Releases for relevant stories, participate in the consortium mailing list. Prerequisites: solid English writing skills, active member of the Linux audio community, past writing experience preferred. 4) Freelance Writers/Interviewers (unlimited number of positions) Duties: submit monthly (or bi-weekly) articles to the Linuxaudio.org (topics are left to your choice as long as they are relevant to our agenda), writers are strongly encouraged to develop a topic-driven periodical with revolving topics which are pertinent to membership and the Linuxaudio.org's mission (i.e. member project interviews, how-tos, updates, etc.), participate in the consortium mailing list. Prerequisites: solid English writing skills, active member of the Linux audio community, past writing experience preferred. 5) Membership recruiters (2 positions) Duties: recruit new members for Linuxaudio.org primarily focusing on the relevant projects within the Linux community, report new members to director for bi-monthly updates, coordinate with other recruiters, participate in the consortium mailing list and management list. Prerequisites: strong communication/recruitment skills, solid English, preferably active member of the Linux audio community. Please note that the consortium mailing list is relatively low-volume, so keeping up with it should not cause you much of an overhead. Similarly, most of the aforesaid positions bear low overhead requiring no more than a few hours per week of your time. Again, if interested, please contact Linuxaudio.org director at ico_AT_linuxaudio_DOT_org. Linuxaudio.org is now bigger and stronger than ever and we hope to continue to grow until we encompass most if not all libre Linux audio projects, as well as allied corporate vendors, institutions, artists, and non-profit organizations, therefore allowing us to best represent, nurture, and protect interests of this vibrant community. Linux audio scene is already a very powerful branch of the Linux scene and with the help of Linuxaudio.org we can make great things happen. For this reason, we hope you will consider partaking in this new exciting initiative by Linuxaudio.org. ABOUT LINUXAUDIO.ORG Linuxaudio.org is a not-for-profit consortium of libre software projects and artists, companies, institutions, organizations, and hardware vendors using Linux kernel-based systems and allied libre software for audio-related work, with an emphasis on professional tools for the music, production, recording, and broadcast industries. The consortium aims to co-ordinate joint projects between members, collaborate on the promotion of Linux based systems for audio tasks, offer programs beneficial to members and subsequently its mission, and provide a single point of contact for prospective industry partners. More information on the Linuxaudio.org consortium can be obtained by visiting: http://www.linuxaudio.org/ Press contacts: Ivica Ico Bukvic at (ico at linuxaudio dot org) ends

19 years

[linux-audio-dev] [ANN] QjackCtl 0.2.21 is out!

by Rui Nuno Capela

Greetings, In the wake of the JACK 0.102.20 release, here goes the respective friendly GUI: QjackCtl 0.2.21 is out. As usual, the change-log says it all: - GPL address update. - All window captions can now be set smaller as tool-widgets. This option takes effect when child windows are kept always on top. - For the brave of heart, specially the ones brave enough to try with Stephane Letz's jackdmp, a win32 build should be now possible. - The main window button text labels are now optional (after a kind suggestion by Geoff Beasley, thanks). - Increse default maximum number of ports setting from 128 to 256. - Initial freebob backend driver support. Also changed the coreaudio backend driver command line device name/id parameter (EXPERIMENTAL). - Closing the main window while not as an active JACK client, nor under a server running state, will just quit the whole application, even though the system-tray icon option is in effect. - The most relevant transport commands (Rewind, Play and Pause) are now made available on the main window context popup menu. - The post-shutdown script is now also being called when using the Stop button, whether the jackd server has been started internally or not. The initial hard-coded default is now on and set to `killall jackd` (as a workaround to an old request from Stephane Letz). - The main window buttons display are now optional. One can choose whether the left, right and/or transport buttons are hidden, making it for a total of six different modes for the main window presentation (after a much simpler suggestion from Paul Davis and Stephane Letz). - Added configure support for x86_64 libraries (UNTESTED). Nuff this time. Hope you enjoy. -- rncbc aka Rui Nuno Capela

19 years, 1 month

[linux-audio-dev] Re: Paper on dynamic range compression

by Ben Loftis

Andreas, I want to thank you for bringing this up. This is very important work. Interest in open-source audio is going to grow DRAMATICALLY within the pro audio industry in the next year or so, and it will be quickly squelched if basic principles ( like smooth gain adjustments given a wide range of inputs ) are ignored. Personally I find many of the plugins, particularly the filters and compressor/gates, to be nearly unusable and certainly not in the same class as commercial offerings. Why should this be true? Commercial developers have the advantages of full-time development, years of focused experience, and expensive test equipment. Open-source developers have the advantage of peer review. I hope that your study is just the first in a series of highly critical looks at the open-source offerings, and that it results in a definition and refinement of the "best practices" that are already known by professional developers. For our part, Harrison has taken an interest in Ardour and has actively guided development towards professional needs for the last 6 months or so. You can expect to see more industry involvement as the benefits of "Free sofware" become obvious to the pro audio world. 10 years of proprietary development has resulted in the stagnation of our industry. For example, there are certain limitations: bit depth, file compatibility, and inter-app communication, that cannot be lifted given the current audio software business environment. These limitations are NOT imposed by Free software like Ardour. Open Source and/or Free software is the only avenue open for true innovation and improvement in sound quality. Please continue to look critically at the available plugins, and continue to raise these issues before there is an influx of professional interest. Open-source plugins may never sound as good as the best commercial offerings ( *cough* Harrison *cough* ), but they shouldn't be allowed to sound BAD, given the wealth of knowledge available in the LAD group. -Ben Loftis www.harrisonconsoles.com

19 years, 1 month

[linux-audio-dev] Gaussian Mixture Models

by Yosvany Llerena Rodríguez

Hi all. I'm student of Telecommunication Systems and my ending homework is related about GMM's - EM algorith for classification. My searchs in IEEE I found a few papers but this paper are just a resume of the technique and I need a Detailed information to develop the full algorithm in C/C++... All your help about any document, or sourceode will be grateful... Thank's in advanced. Yosvany

19 years, 1 month

[linux-audio-dev] avoiding signal invertion

by Andrew Gaydenko

(Sorry for crossposting, it seems like Alsa-user list hasn't an answer) I use ICE1724 ALSA driver for Terratec Aureon 7.1 Space card. I have noticed both default (line out) and plug:spdif devices'es outputs are inverted. Is there a way to add additional inversion and, as a result, to get "normal" output signal? Andrew

19 years, 1 month

[linux-audio-dev] [ANN] Aqualung 0.9beta6 released

by Tom Szilagyi

The developers are pleased to announce the latest release of Aqualung, a music player for GNU/Linux. Website: http://aqualung.sf.net Without further ado, the ChangeLog is attached below. Enjoy, Tom 2006-10-03 Tom Szilagyi <tszilagyi at users dot sourceforge dot net> Aqualung 0.9beta6 http://aqualung.sf.net This release introduces a fair number of substantial improvements: * Music Store builder: automatically build a Music Store by scanning the files on disk. Perform CDDB lookups & extract metadata on the fly. * MPEG decoder enhancements: robust file recognition, VBR and UBR file support, frame-accurate seeking, true gapless playback via eliminating encoder padding+delay read from LAME headers. * Fully revamped metadata support using TagLib. The result is a more complete implementation also supporting APE tags in Musepack files. * Automatic output driver detection: ability to startup without command line arguments (using default driver parameters). * Systray (a.k.a. Notification Area) support. * Handling of compressed MOD files (.gz and .bz2). * Resolved issue with JACK memory locking (which previously resulted in runaway memory consumption when running with realtime JACK output). * Aqualung compiles & runs under FreeBSD and Cygwin. NEW LIBRARY DEPENDENCIES: * TagLib >= 1.4 is now required for metadata support. http://developer.kde.org/~wheeler/taglib.html * GTK+ >= 2.10 is needed for the (optional) Systray support. DROPPED DEPENDENCIES: * libid3tag library is not required anymore (succeeded by TagLib).

19 years, 1 month

[linux-audio-dev] VST API license

by Ivica Ico Bukvic

Hi all, I am in the process of considering to, on behalf of Linuxaudio.org, negotiate with Steinberg possible change of VST API license in order to allow its easier adoption within Linux LGPL/GPL environment. As Daniel has already pointed out, with Yamaha now owning Steinberg, we ought to have a better chance at making this a reality. For this reason, I was wondering if anyone else is currently working on this and if so what is its status. I also recall quite a few years ago Paul trying to compile a letter to Steinberg. Whatever happened to that? Ivica Ico Bukvic, D.M.A. Linuxaudio.org Director Virginia Tech Department of Music - 0240 Blacksburg, VA 24061 (540) 231-1137 (540) 231-5034 (fax) ico(a)linuxaudio.org http://www.music.vt.edu/people/faculty/bukvic

19 years, 1 month

[linux-audio-dev] [ANN] San Dysth V0.1.0, Snd-ls V0.9.7.1, E-Radium V0.61f

by Kjetil S. Matheussen

1. === San Dysth is a standalone realtime soft-synth written in SND. It was first developed as final project for the 220c course at CCRMA. For information about the used synthesizing routine and sound examples, check out San Dysths homepage at: http://www.notam02.no/~kjetism/sandysth/ Requirements ------------ Snd-ls >=0.9.7.1 G2Reverb ladspa plugin. 2. === Snd-ls is a distribution of Bill Schottstaedt's sound editor SND. Its target is people that don't know scheme very well, and don't want to spend too much time configuring Snd. It can also serve as a quick introduction to Snd and how it can be set up. Download from http://www.notam02.no/arkiv/src/snd/ Changes 0.9.7.0 -> 0.9.7.1 --------------------------- -Updated Snd from 8.4/13.9 to 8.4/26.9. Many important fixes. -Added workaround for menu problem. Bug found by Dragan Noveski. -Added check that initialization is complete. -Some realtime fixes. 3. === E-radium is Radium and a special version of E-UAE (with support for realtime scheduling and alsa midi). Radium is a unique type of music event editor made to be efficient and provide many possibilities. The user interface is inspired by trackers, but Radium is more versatile and can be used for all kinds of genres. http://www.notam02.no/radium/ Changes 0.61e -> 0.61f ---------------------- -Fixed all build errors in 0.61e (0.61e should never have been released.) -Made sure everyone can run e-radium after installation, not only root and the user doing the compilation.

19 years, 1 month

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Linux-audio-dev