Linux-audio-user April 2010

linux-audio-user@lists.linuxaudio.org

139 participants
124 discussions

Re: [LAU] Linux-audio-user Digest, Vol 38, Issue 22

by Shani Hadiyanto Pribadi

I read the header file, convert it to hex and comment it here http://pastebin.com/YBQTieNZ The comments came from reading http://www-mmsp.ece.mcgill.ca/Documents/AudioFormats/WAVE/WAVE.html After reading your replies and the page I understood a little better about the problem. > From: Erik de Castro Lopo > It doesn't stop writing data, it stops reading. Basically you have > a file which contains > 4Gig of audio data, but the file header > says its only 20 minutes (60001717 frames). > Im curious, why does wave format need to store the chunk size, does it have any advantages? > Any of W64, RF64 and CAF (all supported by libsndfile) would be fine. > I would not recommend sun/next au; it main disadvantage is that it > has no way of storing meta data. In what way does meta data would be useful? Does it keep the samplerate, and all the technical stuff, or is it to keep other kinds of information? > As for salvaging this file, give me a day or two and I'll write a > utility to drag your data out of the file. Wow, I'm very grateful for you spending your time helping me and answering my questions. Thank you very much. > Erik > -- > ---------------------------------------------------------------------- > Erik de Castro Lopo > http://www.mega-nerd.com/ > From: Rick Green > On Mon, 19 Apr 2010, Erik de Castro Lopo wrote: > >> Any of W64, RF64 and CAF (all supported by libsndfile) would be fine. >> I would not recommend sun/next au; it main disadvantage is that it >> has no way of storing meta data. > > That's not a bug, it's a feature! (In this case, anyway) Could you elaborate in what way does not being able to store meta data a feature? Is meta data harmful or bring any trouble? > > Use a simple utility(dd comes to mind) to strip the header off the .wav > file, and write the rest to .au . I think that .au also has a very simple header. Do I need to add a .au header? Can sox add the header automatically? What is a good way to create it manually? The thing that confuses me is the endianness of the data. Wave is little endian, while this page http://www-mmsp.ece.mcgill.ca/Documents/AudioFormats/AU/AU.html says that AU is big-endian, or is it just the header? Altough on the bottom of the page it says that the data is stored in little endian. So, is it enough to copy the data using dd (minus the header), and add a header file manually? > > Then use another utility (sox?) to read the .au file, which will read the > entire file since it doesn't have any bogus header data to convince it > otherwise, and write out a .w64 file. I tried splitting the file and reading it using sox and it says it can't find Sun/NeXT/DEC identifier. I guess I should add a header myself? > > -- > Rick Green

14 years, 7 months

Re: [LAU] Need help salvaging a recording

by Shani Hadiyanto Pribadi

I did it!!! At first I tried copying it using dd, unfortunately it is very slow since I used bs=1 One of the core usage went up to 100% and after a while my cpu temperature is 72 degC. So I stopped it. And then I wrote a simple python script to read the file skipping the first 112 bytes and copying it to a new file. After that using sox I converted it to w64. Now I'm able to open the full file. Hurray. Thank you very much for all of your help. I wouldn't have a clue what to do without your help. Shani H Pribadi

14 years, 7 months

[ANN] KMetronome 0.9.3 released

by Pedro Lopez-Cabanillas

KMetronome is a MIDI metronome with KDE4 user interface, based on the ALSA sequencer. Changes in 0.9.3 * Build system adapted to the changes in Drumstick-0.3 * Bundled Drumstick-0.3.1 library sources Copyright (C) 2005-2010, Pedro Lopez-Cabanillas License: GPL v2 More info http://kmetronome.sourceforge.net Sources http://sourceforge.net/projects/kmetronome/files/kmetronome/0.9.3/ Regards, Pedro

14 years, 7 months

Composition Competition

by Marc Groenewegen

Hi all, exactly 150 years ago the first sound recording was made, written in ink. In exactly one month the Linux Audio Conference 2010 will take place. These two events gave rise to "The 150-Years-of-Music-Technology Composition Competition" There are nice prizes to be won and of course the honour and fame associated with the winning composition. The winning composition will also be played at the Linux Sound Night on May 3rd. All the info you need for participating in the competition is here: http://wiki.linuxaudio.org/lac2010/composition-competition Have fun ! Than van Nispen tot Pannerden and Marc Groenewegen

14 years, 7 months

Re: [LAU] Chordata 1.0

by Igor Brkic

On 15.04.2010 22:55, David García Garzón wrote: > Let me ask you some questions. > > - Which version of Qt are you using? It's 4.6.2 (I am using 64bit version of Arch, if that means anything). > - Is the QTDIR environment var defined? how? It was set (pointing to /opt/qt where I have qt3 installed) but I unset it before compilation (it was breaking config phase if set). > - Which modules are available at /usr/lib/pkgconfig/Qt*? Qt3Support.pc QtAssistantClient.pc QtCLucene.pc QtCore.pc QtDBus.pc QtDesignerComponents.pc QtDesigner.pc QtGui.pc QtHelp.pc QtMultimedia.pc QtNetwork.pc QtOpenGL.pc QtScript.pc QtScriptTools.pc QtSql.pc QtSvg.pc QtTest.pc QtUiTools.pc QtWebKit.pc QtXmlPatterns.pc QtXml.pc > - If QtDesigner4.pc is one, which is the content? There is no QtDesigner4. Just QtDesigner: ---8<------------------- prefix=/usr exec_prefix=${prefix} libdir=${prefix}/lib includedir=${prefix}/include/QtDesigner qt_config=lex yacc warn_on uic resources qt warn_on release incremental link_prl exceptions no_mocdepend release stl qt_no_framework silent system-sqlite release shared dll largefile stl precompile_header mmx 3dnow sse sse2 dylib create_prl link_prl depend_includepath fix_output_dirs QTDIR_build use_libmysqlclient_r hide_symbols qt dll qt_install_headers create_pc shared dll moc thread Name: Qtdesigner Description: Qtdesigner Library Version: 4.6.2 Libs: -L${libdir} -lQtDesigner Libs.private: -lQtScript -lQtXml -lQtGui -L/usr/X11R6/lib64 -lQtCore -lpthread Cflags: -I/usr/include -I${includedir} Requires: QtXml ---8<------------------- Cheers! Igor

14 years, 7 months

Re: [LAU] digital voodoo: master fader should be set at 0db

by Gwenhwyfaer

On 12/04/2010, fons(a)kokkinizita.net <fons(a)kokkinizita.net> wrote: > While reading some random pages I had an hallucination > about an 'In Depth' DIY-surgery site: > > "If after opening the breast, removing some ribs and > pushing aside the lungs (be careful not to make any > holes in them) you notice an organ that seems to be > pulsating all the time, leave it alone for now. > It's the heart, you can read more about it in <this > post>." Well, there's a slight difference between the two fields in the magnitude of the effects of merely pointing someone in the right general direction and letting them figure out the rest with trial and error...

14 years, 7 months

Need help salvaging a recording

by Shani Hadiyanto Pribadi

Hello guys. I'm in need of help right now. Last night I recorded a show using qtractor. I recorded it as two files, the first one is for the first hour, and second file is for the rest, about 4 hours. The first file can be played successfully, but the second file does not. It would only play until about 20 minutes, and stop. This is the output of soxi shani@shanihplaptop ~/Projects/GME/2010 % soxi 6.wav soxi WARN wav: wave header missing FmtExt chunk Input File : '6.wav' Channels : 2 Sample Rate : 48000 Precision : 24-bit Duration : 00:20:50.04 = 60001717 samples ~ 93752.7 CDDA sectors File Size : 4.77G Bit Rate : 30.6M Sample Encoding: 32-bit Floating Point PCM The first file is only about 1GB, but the duration is about one hour. I wasn't able to verify the recordings last night, but I remember that when it's being recorded the waveforms are shown on the screen just fine. When the show ended, I stopped the recording, pressed Save, and shutdown the computer. I was in a hurry, so I forgot to close qtractor first. Does it have anything to do with the error.? Is there any way to salvage the recording? Might it be that part of the file is corrupt but the rest isn't? Thank you

14 years, 7 months

coping with sample libraries

by Hakan Koseoglu

Hi all, What's the best way of browsing of the sample libraries? Loading them into Amarok takes far too long and I can't get the konqueror show me the tags... There must be an app to do this in a better way! :) Cheers, -- Hakan (m1fcj) - http://www.hititgunesi.org

14 years, 7 months

Call for Papers - Schillinger System

by Kim Cascone

[please send this to composers/researchers who might be interested] Call for Papers - Schillinger System I'm only accepting submissions of abstracts right now. All received submissions will be verified by a return email. If you do not receive email confirmation after submitting your abstract then it was not received and you will need to resubmit. Abstract: 300 words or less Deadline: June 1st Language: English Suggested topic areas for abstracts include: - Earle Brown's study/use of the Schillinger System - applications in electro-acoustic music - applications in electronic music - applications in computer music - applications in visual arts - Schillinger System related software - Schillinger System and aesthetics - Schillinger and Mathematics - the films of Mary Ellen Bute and the Schillinger System - interviews with composers using the System in new music Please direct any related questions to: anechoicmedia(a)gmail.com

14 years, 7 months

Mastered now; comments?

by Ken Restivo

Thanks everyone for your feedback and help! I made a bunch of fixes suggested here, and also ran it through JAMIN. Anyone hear anything glaringly broken in either of these? http://lahar.s3.amazonaws.com/scratchmixes-basic/foie-A.ogg http://lahar.s3.amazonaws.com/scratchmixes-basic/ginseng-A.ogg -ken

14 years, 7 months

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Linux-audio-user April 2010