Linux-audio-dev

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7516 discussions

by Silver Rock

Greetings, I've been studiyng python and some things are not that clear: 1- Is python too slow to efectivelly communicate with Jack? PyJack did not seem to work right, so i tried PySndObj's JackIO object. It did not behave as good as with connection with ALSA. (btw, I could not acess lots of objects in the SndObj library (like Ocil, Rand, while acessing normally Oscilli and Randh...) Does anyone know why?) 2- Python comes with the ossaudiodev module for communication with OSS; Alsa is compatible so it works. Shuld one use this module or use the pyalsasound? 3- pySonic - pySonic the wrapper for the FMOD sound library. but it is not opensource... is there a standard library for sound processing in projects like ardour. 4- Are any differences between 'r' and 'rb'; 'w' and 'wb' in: wave.open('file', 'r') wave.open('file', 'rb') wave.open('file', 'w') wave.open('file', 'wb') ?? 5- I found pySonic, that seems good but it is not open. MusicKit and PySndObj and omde. Ow yeah, and Pygame. Can anyone expose ihre personal experience and explain why? Please be nice, Claire

18 years, 9 months

[linux-audio-dev] donations or sponsoring?

by Leonard Ritter

from http://www.leonard-ritter.com/donations_or_sponsoring I keep bouncing an idea in my head, thinking about how to strengthen the bonding between open source software developers and software users. How is a beginning open source project funded, usually? Most of the time not at all. The site features a donation button, and users are encouraged to donate. As an user, if you like an application very much, and would like to support its development, you might want to donate. However a donation has neither a direct connection to advancement of development, nor does it give you a right to influence the priorities of new features and bug fixes. It gives you no certainty that the application is still going to be developed - what if the developer is being hired for a more lucrative job? There is simply no contract, just a requirement of trust. As an open source developer, how are you going to sustain and finance ongoing development? You can not rely on ongoing donations. You also need to care for fund raising. You have only a small understanding of how many users deem your application to be important. There is no dependency between you and your users, meaning that the choices you make might not necessarily be choices embraced by the community. Again, there is no contract, just a requirement of trust. How to ensure a long-time interdependency between users and developers? Since a long time, the IT world knows multiple answers to this question: service contracts. A company using an open source product commercially would buy a service contract, which includes a warranty for the program and allows the company to prioritize bug fixes and addition of new features. In exchange, the company funds development. Of course, these contracts are of high volume, with a lot more money involved than what an average user would be able to spend. However an industrially used program has also less companies interested in it. My suggestion is to move this to the private software user / open source developer level. Users would be able to subscribe to a sponsoring contract, being able to choose the amount of money they want to pay per month or per year, starting at e.g. EUR 1/month or EUR 12/year. In exchange, each user has a right to get his bugs fixed within a period of 14 days, and also earns a right to influence the priority of new features suggested by the community. The low pricing will make sponsoring attractive and thus increase the number of sponsors. The more importance the project gains, the more developers will get out of this deal, the more dependent they get on subscriptions, the more bugs will be fixed, and the project will not be abandoned. Since most users will have the same problems, the amount of work required will not necessarily increase. Payment could be handled by Paypal, which also supports subscriptions. What do you think? -- Leonard Ritter -- Freelance Art & Logic -- http://www.leonard-ritter.com

18 years, 9 months

[linux-audio-dev] Re: [linux-audio-user] Commercial "clone" of ZynAddSubFX?

by Dave Phillips

Folderol wrote: >On Sat, 3 Feb 2007 01:01:18 -0500 (EST) >Larry Troxler <lt(a)westnet.com> wrote: > >>yn isn't RT safe? Could you elaborate or point to a link? I remember >>reading something about this, and was hoping to use it for live >>performance. >> >> >I have heard several comments to this effect, and also that the code >in Zyn is 'a nightmare' however I have not heard anything specific that >one can really get a handle on. > >While I agree the GUI is poor and could do with quite a lot of work, I >don't know about the rest, although there are changes I would like in >the way voice banks are managed. > >This all causes me quite a lot of concern. I find that Zyn gives >unparallelled results, and conceptually most closely matches my grasp >of sound. I am concerned about talk of unspecified jack problems, and >also the lack of any visible development by the originator. > > Zyn will occasionally just pop itself out of the JACK graph, I'm not sure why. Paul Nasca had talked about upgrading Zyn's JACK support, but I don't think he ever got around to it. Personally I don't mind the GUI. Zyn is a rather "deep" synth, I certainly wouldn't want to see all of its controls in one panel or even two. However, I will agree that its interface design does make it problematic to program. Fortunately its included sounds work beautifully for my purposes. Finally though, Zyn is open-source and GPL'd, so whoever wants to pick up the torch is more than welcome to do so. I have no idea how its code looks, and I'm not likely to make the effort to find out (IANALAD), but surely there's a fledgling (or not-so-fledgling) Linux audio developer out there who wants to make a significant contribution to the Linux audio workplace ? A stable JACKified Zyn seems to rank highly on users' wish-lists. >I, personally, would be willing to expend a great deal of effort to >help revive Zyn, and would be quite happy to put my hand in my >pocket as well. > > Developers, are you listening ? The man is offering his time *and* his money. And are any other users out there who are willing to pony up some dough for a bounty on this item ? (Assuming of course that the task is actually do-able within a reasonable time). Synth development in Linux has seen a severe slowdown over the past year or so. We need things like stabilized Zyn, Om (or whatever DR wants to call it these days), and AMS. Or does everyone plan on waiting for better VSTi support ? Best, dp

18 years, 9 months

[linux-audio-dev] microsoft mails

by Leonard Ritter

http://iowaconsumercase.org/lc-9.html seems the microsoft internal memos from that recent antitrust trial are out. strong stuff. evil at work. -- Leonard Ritter -- Freelance Art & Logic -- http://www.leonard-ritter.com

18 years, 9 months

[linux-audio-dev] wave module in Python

by Silver Rock

hallo, supose i´ve opened a sound with the wave module: >>> import wave >>> sound=wave.open(filename,'rb') now this is strange: >>> sound.getnframes() != len(sound.readframes(sound.getnframes()) True Why so? thanks in advance, Claire

18 years, 9 months

[linux-audio-dev] [ANN] JackMix 0.2 fresh on the shelfs

by Arnold Krille

taken from http://www.arnoldarts.de/drupal/?q=node/532 : "One step back, two ahead!" After almost two years of silence I managed to put together a new release of JackMix. The name explained: Comparing to jackmix:0.1.0 some experimental features are dropped. On the other hand this release is the first to use scons for the buildsystem and qt4 for the toolkit. Download and installation Download the source here: http://www.arnoldarts.de/drupal/files/downloads/jackmix/jackmix-0.2.tar.gz After unpacking (tar xzf jackmix-0.2.tar.gz && cd jackmix-0.2) call QTDIR=<path to your qt4-dir> scons configure to configure and afterwards call scons to compile the app. Calling scons install will install the binary in the chosen bin-directory but you will probably test JackMix before doing that... If your qt4 is installed in /usr/include/qt4 and /usr/lib/qt4 (as it is on gentoo) you need to add qtlibs=/usr/lib/qt4 to the configuration-command above. I will probably change/extend the qt-check in the future but for now this has to be used. Usage Be sure to have a jackd running, preferable via qjackctl which also has a nice window to connect inputs and outputs like the back of your rack. Next start jackmix. If all is well it will present you with a top-row of controls, a big matrix in the middle and some controls on the right. The top controls are the input gain, the right controls are output gain. The matrix in the middle controls the levels sent from the various inputs to the outputs. If you are tired of the simple potis for each channel and want easier mixing into stereo busses there is help available. Just select the potis you want replaced by using "Select" from the context menu of each control and then use "Replace" in the top-left control you want replaced. If all is working JackMix will choose the biggest possible replacing control (current available controls are mono-to-mono, mono-to-stereo and stereo-to-stereo). You can fill the empty places from the "Edit"-menu. Adding and removing of input- and output-channels is also done from the "Edit"-menu. Please note that if no jackd is running, JackMix will start but not show any controls. You can tell JackMix to create new channels, but nothing will happen. Restart JackMix after starting jackd and go on with your work. Changelog Changes since 0.1: -Using scons instead of autotools/make. -Using qt4 instead of qt3. -Dropped the potis borrowed from the kde-project. They where hard to port to qt4 and the ones from qjackctl are much nicer and where easier to port. - The ability to connect faders is dropped. For future releases this will be replaced by VCA-groups similar to bigger mixing-consoles. Have a nice week, Arnold -- visit http://www.arnoldarts.de/ --- Wenn man mit Raubkopien Bands wie Brosis oder Britney Spears wirklich verhindern könnte, würde ich mir noch heute einen Stapel Brenner und einen Sack Rohlinge kaufen.

18 years, 9 months

[linux-audio-dev] [ANN] Aqualung 0.9beta7 released

by Tom Szilagyi

The authors are proud to announce the release of Aqualung 0.9beta7. Aqualung is an advanced music player originally targeted at GNU/Linux, today also running on other operating systems such as FreeBSD and MS Windows. We are striving to create one of the finest music players available, with respect to sound quality, stability, features and ease of use. This release is the latest in a series of beta releases on our way to the future stable release of Aqualung 1.0. It adds significant new functionality as well as important bugfixes. The ChangeLog for this release is listed below. Homepage: http://aqualung.sf.net Enjoy, Tom 2007-02-05 Tom Szilagyi <tszilagyi at users dot sourceforge dot net> * Aqualung 0.9beta7 http://aqualung.sf.net This release introduces important new features and bugfixes. Main reasons for upgrading: * CD Audio support, complete with CDDB, CD-Text, etc. You can play Audio CDs directly, or rip them to WAV, FLAC, Ogg Vorbis or MP3 (CBR/VBR, gapless via LAME) complete with tagging, on the fly. * Revamped Music Store Builder: better operation, greater flexibility. * Support FFmpeg library enabling the recognition of numerous formats e.g. AC3, AAC, WMA, WavPack, and the soundtrack of many video files. * Replaygain support for APEv2 tags. * Ability to set looping range when looping a single file. Should be useful for people playing along a recording, trying to learn phrases of a song. * Adding music to the playlist is now a non-blocking, interruptible background operation. * Drag-and-drop files from external sources (Nautilus, Konqueror, etc) into the Aqualung playlist. * Several critical memory leak fixes. * Numerous GUI refinements; fixed some rare bugs in engine, too. * Support for building against the new FLAC 1.1.3 API. * Aqualung operates correctly on bigendian systems (32 and 64 bit). * Running natively on MS Windows. A port of TAP-plugins is included in the installer. See http://aqualung.sf.net/win32 for more. NEW LIBRARY DEPENDENCIES: All of these are optional; Aqualung will build without them, disabling the functionality they provide. * libcdio >= 0.76 is required for CD audio support. http://www.gnu.org/software/libcdio/ * libvorbisenc for ripping into Ogg Vorbis. http://www.xiph.org/ogg/vorbis/ * libmp3lame for ripping into MP3. http://lame.sourceforge.net/

18 years, 9 months

[linux-audio-dev] [ANN] Releases : Tapeutape and Tranches

by Florent Berthaut

Hi everyone, I'm pleased to announce the release Tranches and Tapeutape. (my first release !!! ) Tapeutape is a midi-controlled virtual sampler.It is highly configurable,lets you create instruments/kits/setups and is designed for live performance.It works on Gnu/Linux with the jack sound server. There's a command-line and a gui version. It can be found at http://www.hitmuri.com/Tapeutape An example of what can be done with it : http://www.hitmuri.com/Tapeutape/demo_tapeutape.ogg Tranches is a midi-controlled multi-(inputs|outputs) live beat repeat|redirect tool for the jack sound server on Gnu/Linux !!! There's a command-line and a gui version. website : http://hitmuri.com/Tranches/ audio example : http://www.hitmuri.com/Tranches/demo_tranches.ogg Regards, Flo

18 years, 9 months

[linux-audio-dev] Sample Rate Conversion in Linux (Newby)

by Jonathan Ryshpan

Which algorithm/library/program is used for sample rate conversion by cdrecord in Linux? Other programs? I assume there is a library to perform this function, which is used by most utilities, xmms, amarok, cdrecord, audacity, etc. Is there any easy way to find this out? I have just done a simple test burning some sound recorded as a WAV file at 48,000 Hz to a CD (at 44,100 Hz of course), and think I have noticed a small reduction in quality. Thanks - jon

18 years, 9 months

[linux-audio-dev] freesound integration in Aldrin

by Leonard Ritter

In my quest to equip Aldrin with some serious collaboration features, I spent the past week adding support for The Freesound Project. http://www.leonard-ritter.com/freesound_integration (includes screenshots and sourcecode) -- Leonard Ritter -- Freelance Art & Logic -- http://www.leonard-ritter.com

18 years, 9 months

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Linux-audio-dev