Linux-audio-dev

linux-audio-dev@lists.linuxaudio.org

3 participants
7536 discussions

by William Steidtmann

Is there a way to check from the command line the audio length (not the size of the file) of an audio file (assume wav, but I also want to do other types, especially flac). So far I have only found this: sox myaudiofile.wav -n stat which gives me more information than I need, but at least I can parse out the length from that output. Is there a simpler more direct approach using some other command line utility ? Bill

17 years, 1 month

Re: [LAD] Audio file audio length

by Julien Claassen

Hi again! The csound utility is called sndinfo, but it also gives more than you need. I know that the sndfile-* and eca* utilities can handle quite a collection of formats .flac definitely included. 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 ======= AND MY PERSONAL PAGES AT: ======= http://www.juliencoder.de

17 years, 1 month

[LAD] [ANN] DSSI 1.0 release; FluidSynth-DSSI, hexter, Xsynth-DSSI updates

by Sean Bolton

Announcing the DSSI Soft Synth Interface version 1.0 release: http://dssi.sourceforge.net/ DSSI is an audio plugin API for software instruments and effects, based on LADSPA, the ALSA sequencer event types, and OSC (Open Sound Control) communications. DSSI is now supported by six full-featured hosts, several specialized hosts, and at least twenty-two DSSI plugins. (See the above URL for a list.) This release contains one small addition to the DSSI API itself, allowing for communication of the sample rate to DSSI UIs. Since the DSSI API has been stable now (with minor additions) for four and a half years, and since most active interest in further extending a Linux softsynth plugin standard has been absorbed by the LV2 project, it seems appropriate to call this release "version 1.0". In addition to the API addition, code and documentation updates have been made in the DSSI release itself, and in FluidSynth-DSSI, hexter, and Xsynth-DSSI. New versions of each are available at the above URL. Specific changes include: DSSI 1.0.0: * Addition to API of the new 'sample-rate' OSC method. * Addition of a Karplus-Strong example synth. * Documentation improvements. * Updates for newer gcc/glibc, for Mac OS X, and for newer JACK. * Addition of man pages thanks to Mark Hymers and Debian. FluidSynth-DSSI 1.0.0: * Fixed a bug that caused distorted sound when hosted by Aldrin. * Updates for Mac OS X. * Changed GUI to handle (ignore) the 'sample-rate' method. * Added '-test' option to allow testing the GUI without a host. hexter 0.6.2: * Updates for newer GTK+. * Changed GUI to handle (ignore) the 'sample-rate' method. Xsynth-DSSI 0.9.2: * Updates for newer gcc/glibc, RPM-based distros, Mac OS X, and newer GTK+. * Changed GUI to handle (ignore) the 'sample-rate' method. * Added '-test' option to allow testing the GUI without a host. Enjoy! Sean Bolton

17 years, 1 month

[LAD] GTK jack based apps cant connect to jack ---> debian glibc 2.8.1 + Jackd 0.116.1

by Josep Andreu

Hi I recently update my debian glibc to 2.8.1, and surprise ... GTK based apps can't connect to jackd server, well even Ardour can't start the server, maybe is a debian glibc/gtk issue, or maybe not .... can anyone check and confirm in other distro? btw qt, fltk jack based apps run fine, and other GTK stuff run. Josep -- Josep Andreu <holborn(a)telefonica.net>

17 years, 1 month

[LAD] [ANN] libsmf-1.2

by Edward Tomasz Napierala

Version 1.2 of libsmf can be downloaded from the projects site: http://sourceforge.net/projects/libsmf/ LibSMF is a BSD-licensed C library for handling SMF ("*.mid") files. It transparently handles time<->pulses conversions, tempo map handling etc. The only dependencies are C compiler and glib. API documentation and examples are included. It was tested under Linux, FreeBSD, MacOS X and Solaris. Please note that, by default, libsmf is built with lots of asserts, which make it slower; for example, inside smf_save, there is some code that loads the newly saved file and compares it with what it was supposed to save. If some operation takes noticeable amount of time, try to recompile libsmf with -DNDEBUG to disable asserts. API documentation is here: http://libsmf.sourceforge.net/api/ SVN repository is here: http://libsmf.svn.sourceforge.net/ Thanks to Dominic Sacré for help with testing this release. -- If you cut off my head, what would I say? Me and my head, or me and my body?

17 years, 1 month

Re: [LAD] Hello (Daire O'Neill)

by Daire O'Neill

Hi all, Many thanks for your replies. Audacity and Traverso are certaintly well-established projects, so I think I could learn a lot from them. I also spoke previously (about a year ago now) with Remon from Traverso, who kindly invited me to join so perhaps that could be an option too. I'm very keen to learn about how audio software works so hopefully this will be the start of my learning. Slightly off the topic...has anybody been having issues with the new pulseaudio server in Ubuntu Intrepid? I tried one of the fixes suggested on the forums (reverting to esound) but it still crashes sometimes. It's annoying me now, the previous version was fine! Thanks, Daire On Wed, Jan 7, 2009 at 2:00 AM, < linux-audio-dev-request(a)lists.linuxaudio.org> wrote: > Send Linux-audio-dev mailing list submissions to > linux-audio-dev(a)lists.linuxaudio.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev > or, via email, send a message with subject or body 'help' to > linux-audio-dev-request(a)lists.linuxaudio.org > > You can reach the person managing the list at > linux-audio-dev-owner(a)lists.linuxaudio.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Linux-audio-dev digest..." > > > Today's Topics: > > 1. open source audio transcribing software? (Ted Walther) > 2. Re: open source audio transcribing software? (Chris Cannam) > 3. Re: open source audio transcribing software? (Ted Walther) > 4. Re: Hello (Patrick Shirkey) > 5. Re: Hello (Grammostola Rosea) > 6. Re: Hello (hollunder(a)gmx.at) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 5 Jan 2009 13:35:47 -0800 > From: Ted Walther <ted(a)reactor-core.org> > Subject: [LAD] open source audio transcribing software? > To: linux-audio-dev(a)lists.linuxaudio.org > Message-ID: <20090105213547.GA14451(a)reactor-core.org> > Content-Type: text/plain; charset=us-ascii; format=flowed > > I tried to install Express Scribe, but it wouldn't install under Ubuntu. > > It has the features I'd need. > > The features I need in such a program is a way to "remotely" signal to > it to pause, rewind five seconds then unpause. A desired feature would > be some way to speed up and slow down the audio stream without altering > the pitch. > > Do I need to program a transcription program for the Open Source world, > or is there one already? > > I worked in the past on FreeBSD audio drivers, and have done some simple > audio applications under Linux, such as a text to morse-code generator. > > I have a lot of transcribing to do, so writing such a program may be > worthwhile if it isn't already done yet. > > Ted > > -- > There's a party in your skull. And you're invited! > > Name: Ted Walther > Phone: 604-625-7635 > Email: ted(a)reactor-core.org > Address: 26337 64 Ave, Langley, BC V4W1M3 > > > ------------------------------ > > Message: 2 > Date: Mon, 5 Jan 2009 22:01:11 +0000 > From: "Chris Cannam" <cannam(a)all-day-breakfast.com> > Subject: Re: [LAD] open source audio transcribing software? > To: "Ted Walther" <ted(a)reactor-core.org> > Cc: linux-audio-dev(a)lists.linuxaudio.org > Message-ID: > <587e90db0901051401l32b7737ek110d596130c24813(a)mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > On Mon, Jan 5, 2009 at 9:35 PM, Ted Walther <ted(a)reactor-core.org> wrote: > > The features I need in such a program is a way to "remotely" signal to > > it to pause, rewind five seconds then unpause. A desired feature would > > be some way to speed up and slow down the audio stream without altering > > the pitch. > > Sonic Visualiser (http://www.sonicvisualiser.org/) can do this with > remote control via OSC, but (a) its visualisation may be overkill, at > least if you are transcribing speech rather than music, and (b) > setting up OSC control for it is a bit of a project in itself. > > There is a small program (sv-osc-send) in the data/osc directory of > the Sonic Visualiser distribution which can be used to send an OSC > command to any program; there is also a shell script (sv-command) > which tries to look up the Sonic Visualiser OSC port and send your > command to the right place; and there is a rather convoluted example > remote-demo script for SV using OSC -- but none of these are provided > with any of the SV binary packages, you need the source package or > repository checkout. Also, for any of this to work, your copy of SV > must have been built with OSC support in the first place (it is > optional). > > > Chris > > > ------------------------------ > > Message: 3 > Date: Mon, 5 Jan 2009 14:29:03 -0800 > From: Ted Walther <ted(a)reactor-core.org> > Subject: Re: [LAD] open source audio transcribing software? > To: Chris Cannam <cannam(a)all-day-breakfast.com> > Cc: linux-audio-dev(a)lists.linuxaudio.org > Message-ID: <20090105222903.GA29879(a)reactor-core.org> > Content-Type: text/plain; charset=us-ascii; format=flowed > > On Mon, Jan 05, 2009 at 10:01:11PM +0000, Chris Cannam wrote: > >On Mon, Jan 5, 2009 at 9:35 PM, Ted Walther <ted(a)reactor-core.org> wrote: > >> The features I need in such a program is a way to "remotely" signal > >> to it to pause, rewind five seconds then unpause. A desired feature > >> would be some way to speed up and slow down the audio stream without > >> altering the pitch. > > > >Sonic Visualiser (http://www.sonicvisualiser.org/) can do this with > >remote control via OSC, but (a) its visualisation may be overkill, at > >least if you are transcribing speech rather than music, and (b) setting > >up OSC control for it is a bit of a project in itself. > > > >There is a small program (sv-osc-send) in the data/osc directory of the > >Sonic Visualiser distribution which can be used to send an OSC command > >to any program; there is also a shell script (sv-command) which tries > >to look up the Sonic Visualiser OSC port and send your command to the > >right place; and there is a rather convoluted example remote-demo > >script for SV using OSC -- but none of these are provided with any of > >the SV binary packages, you need the source package or repository > >checkout. Also, for any of this to work, your copy of SV must have > >been built with OSC support in the first place (it is optional). > > Thanks Chris. That sounds like overkill. While browsing the web for my > needs, it seems like there is a similar situation with dictation > software. Lots of things that "almost" work as needed for the > application, or that work well but with tremendous overhead. > > Ted > > -- > There's a party in your skull. And you're invited! > > Name: Ted Walther > Phone: 604-625-7635 > Email: ted(a)reactor-core.org > Address: 26337 64 Ave, Langley, BC V4W1M3 > > > ------------------------------ > > Message: 4 > Date: Tue, 06 Jan 2009 09:36:06 +0700 > From: Patrick Shirkey <pshirkey(a)boosthardware.com> > Subject: Re: [LAD] Hello > To: Daire O'Neill <oneill.daire(a)gmail.com> > Cc: linux-audio-dev(a)lists.linuxaudio.org > Message-ID: <4962C396.4000103(a)boosthardware.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Daire O'Neill wrote: > > Hi all, > > > > My name is Daire O'Neill. I've just joined the list to hopefully begin > > my learning on audio development and possibly to contribute to some > > current projects. As a beginner, I have only basic C/C++ skills, and > > have never worked on any major project before. I do have a good > > knowledge of audio technology and some basic DSP concepts, its the > > programming side of things that lets me down! I'm currently working my > > way through 'Accelerated C++' by Koenig and Moo though, so I'm > > learning every day. I really want to learn about audio development and > > become involved with an audio project, particularly a multitrack > > recorder. I would like to be able to write my own simple multitrack > > recorder eventually. Anyway, if anyone has any tips or suggestions, or > > can recommend a project where I could be of help, then please let me > > know. > > > Hi, > > Welcome to Linux Audio Development. > > There are several projects that you may be interested in contributing to. > > The most advanced is Ardour. It uses c++ and you will learn a lot > studying the code. > > There is also Audacity which is cross platform so that could be another > good app to get involved with. > > For a full list of apps check out the apps wiki > > http://apps.linuxaudio.org > > > > Cheers. > > > > > > Regards, > > > > Daire > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > Linux-audio-dev mailing list > > Linux-audio-dev(a)lists.linuxaudio.org > > http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev > > > > > -- > Patrick Shirkey > Boost Hardware Ltd. > > > > > > ------------------------------ > > Message: 5 > Date: Tue, 06 Jan 2009 11:10:40 +0100 > From: Grammostola Rosea <rosea.grammostola(a)gmail.com> > Subject: Re: [LAD] Hello > Cc: linux-audio-dev(a)lists.linuxaudio.org > Message-ID: <49632E20.5090801(a)gmail.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Patrick Shirkey wrote: > > Daire O'Neill wrote: > > > >> Hi all, > >> > >> My name is Daire O'Neill. I've just joined the list to hopefully begin > >> my learning on audio development and possibly to contribute to some > >> current projects. As a beginner, I have only basic C/C++ skills, and > >> have never worked on any major project before. I do have a good > >> knowledge of audio technology and some basic DSP concepts, its the > >> programming side of things that lets me down! I'm currently working my > >> way through 'Accelerated C++' by Koenig and Moo though, so I'm > >> learning every day. I really want to learn about audio development and > >> become involved with an audio project, particularly a multitrack > >> recorder. I would like to be able to write my own simple multitrack > >> recorder eventually. Anyway, if anyone has any tips or suggestions, or > >> can recommend a project where I could be of help, then please let me > >> know. > >> > >> > > Hi, > > > > Welcome to Linux Audio Development. > > > > There are several projects that you may be interested in contributing to. > > > > The most advanced is Ardour. It uses c++ and you will learn a lot > > studying the code. > > > > There is also Audacity which is cross platform so that could be another > > good app to get involved with. > > > > For a full list of apps check out the apps wiki > > > > http://apps.linuxaudio.org > > > > > > > > > I know Audacity was searching for a JACK developer to get better JACK > support. > > You also can take a look here for some small projects: > > http://linuxmusicians.com/viewforum.php?f=44 > > > > ------------------------------ > > Message: 6 > Date: Tue, 6 Jan 2009 12:44:32 +0100 > From: <hollunder(a)gmx.at> > Subject: Re: [LAD] Hello > To: linux-audio-dev(a)lists.linuxaudio.org > Message-ID: <20090106124432.0248455d(a)gmx.at> > Content-Type: text/plain; charset=US-ASCII > > On Tue, 06 Jan 2009 11:10:40 +0100 > Grammostola Rosea <rosea.grammostola(a)gmail.com> wrote: > > > Patrick Shirkey wrote: > > > Daire O'Neill wrote: > > > > > >> Hi all, > > >> > > >> My name is Daire O'Neill. I've just joined the list to hopefully > > >> begin my learning on audio development and possibly to contribute > > >> to some current projects. As a beginner, I have only basic C/C++ > > >> skills, and have never worked on any major project before. I do > > >> have a good knowledge of audio technology and some basic DSP > > >> concepts, its the programming side of things that lets me down! > > >> I'm currently working my way through 'Accelerated C++' by Koenig > > >> and Moo though, so I'm learning every day. I really want to learn > > >> about audio development and become involved with an audio project, > > >> particularly a multitrack recorder. I would like to be able to > > >> write my own simple multitrack recorder eventually. Anyway, if > > >> anyone has any tips or suggestions, or can recommend a project > > >> where I could be of help, then please let me know. > > >> > > >> > > > Hi, > > > > > > Welcome to Linux Audio Development. > > > > > > There are several projects that you may be interested in > > > contributing to. > > > > > > The most advanced is Ardour. It uses c++ and you will learn a lot > > > studying the code. > > > > > > There is also Audacity which is cross platform so that could be > > > another good app to get involved with. > > > > > > For a full list of apps check out the apps wiki > > > > > > http://apps.linuxaudio.org > > > > > > > > > > > > > > I know Audacity was searching for a JACK developer to get better JACK > > support. > > > > You also can take a look here for some small projects: > > > > http://linuxmusicians.com/viewforum.php?f=44 > > Traverso is also looking for developers, it's C++/qt4 and has an > unusual UI concept. > > > ------------------------------ > > _______________________________________________ > Linux-audio-dev mailing list > Linux-audio-dev(a)lists.linuxaudio.org > http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev > > > End of Linux-audio-dev Digest, Vol 23, Issue 3 > ********************************************** >

17 years, 1 month

[LAD] 1 and 2 and 3 and 4 ...

by Thorsten Wilms

Hi! This already went to the LAU list, please ignore if you are subscribed there, too. This is a call for contributions. Take your chance of becoming part of a crowd of people all around the world, counting to the rhythm in several languages! Contributors will be credited in order of their submissions and this will also likely influence the order of use in the track ;) Besides recording yourself and family and friends and pets (if they are able to count), you can help by spreading the word. What I'm after are recordings of one person at a time, saying: A: "One Two Three Four" B: "One and Two and Three and Four and" C: "Beat" (to be translated to whatever makes sense 4 times in one measure at 4/4. A single utterance is enough, as I want to use these as accent.) - Translated in a native language and any language spoken without much of an accent. If there are special ways of counting to the beat in a language, use those (only or even better additionally) and inform me. - With a tempo of 110 beats per minute (to be very clear, the "and" has to be between beats ;). - A and B should ideally be recorded with about 4 iterations (4 measures) Don't think that your language will already be well-represented without you. Others might think the same ;) Also, the more I can layer in one language, the better. All files should be: - ideally wavpacked, or plain WAV as second choice - 32 bit float, 48 KHz - Trimmed - Normalized - Dry - Explicitly licensed as http://creativecommons.org/licenses/by-sa/2.0/ or released to the Public Domain _Only_ if you don't record with a JACK application, 16 and 24 bit integer formats are also acceptable. Please name the files as follows: - firstname_lastname_language_count.wav for "One Two Three Four" - firstname_lastname_language_count_and.wav for "One and Two ..." - firstname_lastname_language_beat.wav for "Beat" Email attachments are no option for such large files, so only send links to uploads. Consider using http://www.getdropbox.com/ if you have no other space. Please mail me off-list for submissions and on-list for questions. I'm also available as thorwil in #lad and #ardour at irc.freenode.net. My intention is to offer the result and the material on archive.org. This is an open-source project ;) I also want to submit a version to the https://wiki.ubuntu.com/UbuntuFreeCultureShowcase I can't promise to use all contributions. I will sort out ones that sound suspiciously different from others claimed to be in the same language ;) However, all serious contributors will be given credit. Deadline: I will start to work with the material as soon as I have enough, but will accept more until the 23rd of January. Thanks! -- Thorsten Wilms thorwil's design for free software: http://thorwil.wordpress.com/

17 years, 1 month

[LAD] Hello

by Daire O'Neill

Hi all, My name is Daire O'Neill. I've just joined the list to hopefully begin my learning on audio development and possibly to contribute to some current projects. As a beginner, I have only basic C/C++ skills, and have never worked on any major project before. I do have a good knowledge of audio technology and some basic DSP concepts, its the programming side of things that lets me down! I'm currently working my way through 'Accelerated C++' by Koenig and Moo though, so I'm learning every day. I really want to learn about audio development and become involved with an audio project, particularly a multitrack recorder. I would like to be able to write my own simple multitrack recorder eventually. Anyway, if anyone has any tips or suggestions, or can recommend a project where I could be of help, then please let me know. Regards, Daire

17 years, 1 month

[LAD] open source audio transcribing software?

by Ted Walther

I tried to install Express Scribe, but it wouldn't install under Ubuntu. It has the features I'd need. The features I need in such a program is a way to "remotely" signal to it to pause, rewind five seconds then unpause. A desired feature would be some way to speed up and slow down the audio stream without altering the pitch. Do I need to program a transcription program for the Open Source world, or is there one already? I worked in the past on FreeBSD audio drivers, and have done some simple audio applications under Linux, such as a text to morse-code generator. I have a lot of transcribing to do, so writing such a program may be worthwhile if it isn't already done yet. Ted -- There's a party in your skull. And you're invited! Name: Ted Walther Phone: 604-625-7635 Email: ted(a)reactor-core.org Address: 26337 64 Ave, Langley, BC V4W1M3

17 years, 1 month

[LAD] Developers section @ linuxmusicians.com

by Grammostola Rosea

Hi, A couples months ago we started a forum at linuxmusicians.com . Our aim is to bring Linux musicians together and help each other to make music on the Linux platform. We want to promote FLOSS software for making music. We also want to make making music on Linux more accessible for newbies and less computer minded people. We think a forum is a good platform for this. For making music on Linux, we need of course good software. To inspire and help people to become a Linux audio developer, we launched a special part for developers on our forum, which you can find here: http://linuxmusicians.com/viewforum.php?f=44 As mentioned before, this should be a good and accessible place for newbie programmers. But we also like to invite more experienced developers to share their stuff, knowledge and help some newbies with their first steps. Would be cool if some of you guys will visit the forum sometimes a month (for example) and give some feedback to newbie programmers or projects. If someone like to write an article about how to become a Linux audio programmer and how to start, you're very welcome! We are aware of the fact that there is also a linux-audio-dev mailinglist and IRC channel. We also think the Linux audio development community should operate as centralized as possible. So people can learn from each other and make a good interaction between different apps and projects as good as possible. That's why we wrote a short introduction in which we make new developers aware of the existence of these places. http://linuxmusicians.com/viewtopic.php?f=44&t=780 We hope we can inspire young and talented people to become a Linux audio developer. We hope that you guys will support this initiative and are willing to help new developers find their ways in the world of Linux audio development. Kind regards, \r

17 years, 1 month

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Linux-audio-dev