Linux-audio-dev

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7520 discussions

RE: [linux-audio-dev] Job: Schematic Designer

by Hans de Roode

Hello Patrick, I have about 10 years experience designing all sorts of electronics, from power to RF electronics using Protel 99. Could I work from home here in New Zealand? Kind regards, Hans de Roode. -----Original Message----- From: Patrick Shirkey [mailto:pshirkey@boosthardware.com] Sent: Thursday, 8 February 2007 11:10 p.m. To: linux-audio-dev(a)music.columbia.edu Subject: [linux-audio-dev] Job: Schematic Designer Hi, I have an opportunity for an experienced PCB schematic designer to work with a large audio company on a contractual basis. Ideally you should have experience designing PCB schematics for mp3 players. You would also have to work with me and have laid back but efficient communication skills to get on with others in the company. If you are interested in knowing more please send me a resume and I will get back to you with more details. Cheers. -- Patrick Shirkey http://www.lau.linuxaudio.org http://www.boosthardware.com "Anything your mind can see you can manifest physically and then it will become reality..." - Macka B

18 years, 10 months

[linux-audio-dev] How to find out actual max priority available

by Jonathan Ryshpan

The functions sched_get_priority_max() and sched_get_priority_min() return the max and min priorities available for the scheduling policy in force (currently 99 and 1 for SCHED_RR). What method can be used to discover the max priority currently available to the current process, as controlled by /etc/security/limits.conf (or whatever controls it at the time of the inquiry)? In particular this is for the kernel 2.6.19-1.2895.fc6 running (naturally) under Fedora Core 6. Thanks - jon

18 years, 10 months

[linux-audio-dev] Job: Schematic Designer

by Patrick Shirkey

Hi, I have an opportunity for an experienced PCB schematic designer to work with a large audio company on a contractual basis. Ideally you should have experience designing PCB schematics for mp3 players. You would also have to work with me and have laid back but efficient communication skills to get on with others in the company. If you are interested in knowing more please send me a resume and I will get back to you with more details. Cheers. -- Patrick Shirkey http://www.lau.linuxaudio.org http://www.boosthardware.com "Anything your mind can see you can manifest physically and then it will become reality..." - Macka B

18 years, 10 months

[linux-audio-dev] sampler instrument definition standard needed

by Leonard "paniq" Ritter

hi everybody, i'm looking for a sampler instrument file format similar to .nki, .sf2 or akai instruments. is there an open standard existing already, perhaps even accompanied by some sort of library? -- -- Leonard Ritter -- http://www.leonard-ritter.com -- http://www.paniq.org

18 years, 10 months

[linux-audio-dev] Python

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, 10 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, 10 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, 10 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, 10 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, 10 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, 10 months

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Linux-audio-dev