Linux-audio-dev

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7440 discussions

[linux-audio-dev] Planning and Scheduling CD

by Tessa Marquis

New Standard Institute has developed "Maintenance Planning and Scheduling", a computer based training. This product is available as an instant download or on a CD and has been nominated "Product of the Year Finalist" by Plant Engineering magazine. Click on the link below for details. http://www.newstandardinstitute.com/mps2.cfm?uniqueid=F0876 The material is extracted from New Standard's seminar on the subject, enhanced with animation, interactive examples, pop-up definitions, enlargeable graphics, narration and an internal search function. We continue to provide our seminars in major North American cities such as Nashville, Toronto, New Orleans, and Orlando. For personal assistance, contact: Tessa Marquis tmarquis(a)newstandardinstitute.com or by telephone at 203 783 1582

21 years, 4 months

[linux-audio-dev] pthreads and signals

by Paul Davis

is there anyone here who has any idea how to handle segv's in a linuxthreads-using application? i know that many of you are aware that i've used threads a lot in my apps, and grappled with lots of tricky signal related issues. however, i continue to see something really deeply ugly in linuxthreads: segfaults seem not to be handled in the same way as other signals. when a thread in ardour causes a segfault, that thread is killed (actually, it becomes a zombie, waiting for its parent to exit) and thats the end of the signal handling. for all other signals, my code causes them are delivered to a single thread that is waiting on all waitable signals except SIGCHLD, and we get control there in a useful way. its very distressing: a segfault will cause ardour to cease normal operation, but nothing knows it has happened. if its in (say) the disk butler thread, the GUI will continue working normally, but nothing will actually do the right thing. has anybody come up with code in which segfaults within threads are handled? i have a few ideas on an approach that might work, but i'm asking first :) nb. this is true in JACK as well.

21 years, 4 months

[linux-audio-dev] FFTW 3.0 performance testing?

by Anders Torger

Has anyone made any FFTW 3.0 performance testing? I'm especially interested to know how it compares on a Pentium 4 (or similar) to the FFT found in Intel's proprietary performance libraries. /Anders Torger

21 years, 4 months

[linux-audio-dev] Jack Audio Connection Kit version 0.71.2

by Taybin

Updated README with tip for better performance. Removed fltk example client from package. This should fix any problems with building the fltk client. Taybin Rutkin

21 years, 4 months

[linux-audio-dev] Kylix bummer

by nickt

after all that getting everyone worked up about it, it doesn't work for me. It doesn't support Red Hat 8.0. After a huge amount of hacking I got it to run and compile, but it won't link anything. Delphi runs fine, but Pascal sucks, and I am not using it. So I will go with the Linux spirit and work with Qt/Designer. It looks really smartly done and I'm sure I can get the hang of it in a while. I know that GNOME started because Qt used to have a proprietary license right? I don't really care which desktop (Red Hat all looks the same anyways) I use but GTK was the most awkward GUI toolkit I ever used. FLTK is really pretty good and I hope 2.0 will address some issues with it (like more tutorials on doing graphics/drawing with it). Oh well! Adios kylix.

21 years, 4 months

Re: [linux-audio-dev] ladspxmlgui needs numeric input controllers

by peschler＠t-online.de

>I've looked, but can't find anything about ladspaxmlgui.dtd ... can > someone give me a URL or something which points to this DTD? I got this from http://www.ladspa.org at the bottom of the page. Or directly try: http://www.ladspa.org/ladspaxmlgui.dtd -- "Without music, life would _O_/ \_O_/ +----------------------+ be a mistake - I would / )) [] | Peter Eschler | only believe in a god who \\ // | peschler(a)t-online.de | knew how to dance." (Nietzsche) // \\ +----------------------+

21 years, 4 months

[linux-audio-dev] ladspxmlgui needs numeric input controllers

by peschler＠t-online.de

Hi, i'm new to this list but tried to catch up by reading the archives. I'm currently playing around with a gui-backend based on Qt which uses the proposed ladspaxmlgui.dtd. If have some questions concerning the controller element. <!ELEMENT controller (graphics-context?)> <!ATTLIST controller port CDATA #REQUIRED label CDATA #IMPLIED label-position (top | bottom | left | right | upper-left | upper-right | lower-left | lower-right) "top" type (knob | hslider | vslider | spinner | image) "knob" image-regexp CDATA #IMPLIED > First, what is the label intended to contain ? - the port name - user definable text - the port value Second, imagine a normal slider or knob in an everyday plugin. Surely it is fine to use the slider/knob to go wild changing the value interactively. But what if i want to specify a value precisely . Fiddling around with my mouse until i managed to set the desired value ? What if, even worse, the gui doesn't snap to my value according to pixel inaccuracy. IMHO the solution to this problem is a numeric input for LADSPA_Data values, that could be placed above/below/... the slider to display and edit the value. In fact the input could be placed everywhere in the gui, theres no actual connection between them apart from the numeric input being attached to the same port as the slider is. Is this possible (dont see why it shouldn't) ? The numeric input might be usable not only in combination with a slider, but also as a standalone controller. Thus i propose an additional control element of type "numinput". One problem arising from the slider example (and not when used standalone) is : If used in the way described above (slider + numinput below) we have a label for both controls. What to do with these two ? According to the documentation in the dtd, the label "should always be supplied for user-convenience". The solution in this case might be to add the attribute "none" to the label-position attribute list. According to the comments in the dtd this is one of the rare situation one of the labels is optional. To put this altogether my controller element section would look like this: <!ELEMENT controller (graphics-context?)> <!ATTLIST controller port CDATA #REQUIRED label CDATA #IMPLIED label-position (none | top | bottom | left | right | upper-left | upper-right | lower-left | lower-right) "top" type (knob | hslider | vslider | spinner | image | numinput ) "knob" image-regexp CDATA #IMPLIED > There might arise questions about display precision for float values, but i would leave this up to the gui element itself. In my Qt implementation i adopt the number of decimal places according to the value displayed. The larger the absolute value the lesser decimal places ( e.g.: 1.214, -10.23, 935.3, 16003 ); Comments are welcome. //Peter -- "Without music, life would _O_/ \_O_/ +----------------------+ be a mistake - I would / )) [] | Peter Eschler | only believe in a god who \\ // | peschler(a)t-online.de | knew how to dance." (Nietzsche) // \\ +----------------------+

21 years, 4 months

[linux-audio-dev] MVC References?

by David Arney

I've found a large number of references to MVC with google and citeseer, but I wonder if someone could point out the classic or canonical papers on this system? It would save a lot of reading about smalltalk. thanks! Dave Arney

21 years, 4 months

[linux-audio-dev] (Sydney) Music/ Audio group meeting (fwd)

by Conrad Parker

hey, for anyone in Sydney, Australia, we're starting up a monthly Linux Audio and music SIG, with the first meeting this saturday ... this is a special interest group of the Sydney Linux Users Group, hosted by the Department of Contemporary Music Studies at Macquarie University. It's being organised by Denis Crowdy of that department. I'll demo some JACK stuff because it rocks, and we can all make some noise. Erik of Secret Rabbit Code (libsamplerate, oh and libsndfile) will be there, as will Steve K of the Debian ALSA Psychos. It's free, bring your gear, hubs, speakers, mics and headphones, and let's crank it up cos there's no neighbours for a mile around :) details at http://www.slug.org.au/, announcement copied below! Conrad. ----- Forwarded message from Denis Crowdy <dcrowdy(a)pip.hmn.mq.edu.au> ----- From: Denis Crowdy <dcrowdy(a)pip.hmn.mq.edu.au> To: announce(a)slug.org.au Date: Thu, 8 May 2003 18:45:07 +1000 Subject: [SLUG-ANNOUNCE] Music/ Audio group meeting First Meeting of SLAG (Slug Linux Audio/ music Group) (or the more rhythmic SLUGAMuSIG - best said in three I reckon). When: Saturday, May 17; 10am onwards Where: Macquarie University, Department of Contemporary Music Studies, building W6A, room 607 As discussed briefly at the last SLUG monthly meeting, a place and time has been organised for people interested in music and audio with Linux. The plan: 10am - Arrive and set up machines for those bringing computers in. Coffee, getting organised. 11am - Conrad Parker will present a demonstration of Jack (http://jackit.sourceforge.net/) - an audio connection kit, and associated apps. Lunch (bring with you, or bring money...); options include The Ranch (pub) and Macquarie Centre. After lunch - general discussion, assistance with installation (ALSA, for example), audio and the 2.5 kernel, demos, playing, making music and so on. A relevant map of Macquarie is at http://www.ccms.mq.edu.au/crowdy/macmap.html. The best way to get to the Music Department (on the 6th floor of building W6A) is from the Balaclava Rd entrance (opposite Woolies from Epping Rd). The closest parking is "W4", and costs $6.00 for the day. For people arriving at various times through the day, the front door might be locked, but we'll keep an eye out, or call me on 0408 478 802. Denis Crowdy -- Department of Contemporary Music Studies Macquarie University NSW 2109 Australia, ph: +61 (0)2 9850 6787, fax: 9850 6593 http://www.ccms.mq.edu.au -- SLUG - Sydney Linux User Group Announcements List - http://slug.org.au More info: http://lists.slug.org.au/listinfo/announce ----- End forwarded message -----

21 years, 4 months

[linux-audio-dev] Kylix

by nickt

What does the Open source community think of Kylix? I am thinking of using it for my projects. I have experience with Borland C++ Builder and I would be able to do much better looking work with it. So far I think the GUI kits on Linux are a bit primitive compared to what I was using on Windows. I could do cool stuff with Kylix very easily. I think Borland C++ Builder was the best development tool ever made for Rapid development work. And since I am a Rapid kind of guy it suited my way of doing things perfectly. FLTK and GTK are not rapid tools, sorry, they just aren't, they are very clumsy for doing rapid prototyping with (but FLTK is better than GTK at this). The only downside is people would need Kylix to compile my programs. It's a huge download and not everyone has cable modems. I am most likely going to take the plunge and head to it. I think Kylix is the best thing to come to Linux yet. I just don't see anyone using it right now. I am not sure why. I have got it and I am going to set it up and see what goes on. It said the open version can be used to make GPL programs with it.

21 years, 4 months

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Linux-audio-dev